Possibly events might have happened differently had Edison been able to prevent the announcement of his electric-light inventions until he was entirely prepared to bring out the system as a whole, ready for commercial exploitation, but the news of his production of a practical and successful incandescent lamp became known and spread like wild-fire to all corners of the globe. It took more than a year after the evolution of the lamp for Edison to get into position to do actual business, and during that time his laboratory was the natural Mecca of every inquiring person. Small wonder, then, that when he was prepared to market his invention he should find others entering that market, at home and abroad, at the same time, and with substantially similar merchandise.

Edison narrates two incidents that may be taken as characteristic of a good deal that had to be contended with, coming in the shape of nefarious attack. "In the early days of my electric light," he says, "curiosity and interest brought a great many people to Menlo Park to see it. Some of them did not come with the best of intentions. I remember the visit of one expert, a well-known electrician, a graduate of Johns Hopkins University, and who then represented a Baltimore gas company. We had the lamps exhibited in a large room, and so arranged on a table as to ill.u.s.trate the regular layout of circuits for houses and streets.

Sixty of the men employed at the laboratory were used as watchers, each to keep an eye on a certain section of the exhibit, and see there was no monkeying with it. This man had a length of insulated No. 10 wire pa.s.sing through his sleeves and around his back, so that his hands would conceal the ends and no one would know he had it. His idea, of course, was to put this wire across the ends of the supplying circuits, and short-circuit the whole thing--put it all out of business without being detected. Then he could report how easily the electric light went out, and a false impression would be conveyed to the public. He did not know that we had already worked out the safety-fuse, and that every group of lights was thus protected independently. He put this jumper slyly in contact with the wires--and just four lamps went out on the section he tampered with. The watchers saw him do it, however, and got hold of him and just led him out of the place with language that made the recording angels jump for their typewriters."

The other incident is as follows: "Soon after I had got out the incandescent light I had an interference in the Patent Office with a man from Wisconsin. He filed an application for a patent and entered into a conspiracy to 'swear back' of the date of my invention, so as to deprive me of it. Detectives were put on the case, and we found he was a 'faker,' and we took means to break the thing up. Eugene Lewis, of Eaton & Lewis, had this in hand for me. Several years later this same man attempted to defraud a leading firm of manufacturing chemists in New York, and was sent to State prison. A short time after that a syndicate took up a man named Goebel and tried to do the same thing, but again our detective-work was too much for them. This was along the same line as the attempt of Drawbaugh to deprive Bell of his telephone. Whenever an invention of large prospective value comes out, these cases always occur. The lamp patent was sustained in the New York Federal Court. I thought that was final and would end the matter, but another Federal judge out in St. Louis did not sustain it. The result is I have never enjoyed any benefits from my lamp patents, although I fought for many years." The Goebel case will be referred to later in this chapter.

The original owner of the patents and inventions covering his electric-lighting system, the Edison Electric Light Company (in which Edison was largely interested as a stockholder), thus found at the outset that its commercial position was imperilled by the activity of compet.i.tors who had sprung up like mushrooms. It became necessary to take proper preliminary legal steps to protect the interests which had been acquired at the cost of so much money and such incessant toil and experiment. During the first few years in which the business of the introduction of the light was carried on with such strenuous and concentrated effort, the attention of Edison and his original a.s.sociates was constantly focused upon the commercial exploitation and the further development of the system at home and abroad. The difficult and perplexing situation at that time is thus described by Major S. B.

Eaton:

"The reason for the delay in beginning and pushing suits for infringements of the lamp patent has never been generally understood. In my official position as president of the Edison Electric Light Company I became the target, along with Mr. Edison, for censure from the stockholders and others on account of this delay, and I well remember how deep the feeling was. In view of the facts that a final injunction on the lamp patent was not obtained until the life of the patent was near its end, and, next, that no damages in money were ever paid by the guilty infringers, it has been generally believed that Mr. Edison sacrificed the interest of his stockholders selfishly when he delayed the prosecution of patent suits and gave all his time and energies to manufacturing. This belief was the stronger because the manufacturing enterprises belonged personally to Mr. Edison and not to his company.

But the facts render it easy to dispel this false belief. The Edison inventions were not only a lamp; they comprised also an entire system of central stations. Such a thing was new to the world, and the apparatus, as well as the manufacture thereof, was equally new. Boilers, engines, dynamos, motors, distribution mains, meters, house-wiring, safety-devices, lamps, and lamp-fixtures--all were vital parts of the whole system. Most of them were utterly novel and unknown to the arts, and all of them required quick, and, I may say, revolutionary thought and invention. The firm of Babc.o.c.k & Wilc.o.x gave aid on the boilers, Armington & Sims undertook the engines, but everything else was abnormal. No factories in the land would take up the manufacture. I remember, for instance, our interviews with Messrs. Mitch.e.l.l, Vance & Co., the leading manufacturers of house gas-lighting fixtures, such as brackets and chandeliers. They had no faith in electric lighting, and rejected all our overtures to induce them to take up the new business of making electric-light fixtures. As regards other parts of the Edison system, notably the Edison dynamo, no such machines had ever existed; there was no factory in the world equipped to make them, and, most discouraging of all, the very scientific principles of their construction were still vague and experimental.

"What was to be done? Mr. Edison has never been greater than when he met and solved this crisis. 'If there are no factories,' he said, 'to make my inventions, I will build the factories myself. Since capital is timid, I will raise and supply it. The issue is factories or death.' Mr.

Edison invited the cooperation of his leading stockholders. They lacked confidence or did not care to increase their investments. He was forced to go on alone. The chain of Edison shops was then created. By far the most perplexing of these new manufacturing problems was the lamp. Not only was it a new industry, one without shadow of prototype, but the mechanical devices for making the lamps, and to some extent the very machines to make those devices, were to be invented. All of this was done by the courage, capital, and invincible energy and genius of the great inventor. But Mr. Edison could not create these great and diverse industries and at the same time give requisite attention to litigation.

He could not start and develop the new and hard business of electric lighting and yet spare one hour to pursue infringers. One thing or the other must wait. All agreed that it must be the litigation. And right there a lasting blow was given to the prestige of the Edison patents.

The delay was translated as meaning lack of confidence; and the alert infringer grew strong in courage and capital. Moreover, and what was the heaviest blow of all, he had time, thus unmolested, to get a good start.

"In looking back on those days and scrutinizing them through the years, I am impressed by the greatness, the solitary greatness I may say, of Mr. Edison. We all felt then that we were of importance, and that our contribution of effort and zeal were vital. I can see now, however, that the best of us was nothing but the fly on the wheel. Suppose anything had happened to Edison? All would have been chaos and ruin.. To him, therefore, be the glory, if not the profit."

The foregoing remarks of Major Eaton show authoritatively how the much-discussed delay in litigating the Edison patents was so greatly misunderstood at the time, and also how imperatively necessary it was for Edison and his a.s.sociates to devote their entire time and energies to the commercial development of the art. As the lighting business increased, however, and a great number of additional men were initiated into its mysteries, Edison and his experts were able to spare some time to legal matters, and an era of active patent litigation against infringers was opened about the year 1885 by the Edison company, and thereafter continued for many years.

While the history of this vast array of legal proceedings possesses a fascinating interest for those involved, as well as for professional men, legal and scientific, it could not be expected that it would excite any such feeling on the part of a casual reader. Hence, it is not proposed to enc.u.mber this narrative with any detailed record of the numerous suits that were brought and conducted through their complicated ramifications by eminent counsel. Suffice it to say that within about sixteen years after the commencement of active patent litigation, there had been spent by the owners of the Edison lighting patents upward of two million dollars in prosecuting more than two hundred lawsuits brought against persons who were infringing many of the patents of Edison on the incandescent electric lamp and component parts of his system. Over fifty separate patents were involved in these suits, including the basic one on the lamp (ordinarily called the "Filament"

patent), other detail lamp patents, as well as those on sockets, switches, dynamos, motors, and distributing systems.

The princ.i.p.al, or "test," suit on the "Filament" patent was that brought against "The United States Electric Lighting Company," which became a cause celebre in the annals of American jurisprudence. Edison's claims were strenuously and stubbornly contested throughout a series of intense legal conflicts that raged in the courts for a great many years. Both sides of the controversy were represented by legal talent of the highest order, under whose examination and cross-examination volumes of testimony were taken, until the printed record (including exhibits) amounted to more than six thousand pages. Scientific and technical literature and records in all parts of the civilized world were subjected to the most minute scrutiny of opposing experts in the endeavor to prove Edison to be merely an adapter of methods and devices already projected or suggested by others. The world was ransacked for anything that might be claimed as an antic.i.p.ation of what he had done.

Every conceivable phase of ingenuity that could be devised by technical experts was exercised in the attempt to show that Edison had accomplished nothing new. Everything that legal ac.u.men could suggest--every subtle technicality of the law--all the complicated variations of phraseology that the novel nomenclature of a young art would allow--all were pressed into service and availed of by the contestors of the Edison invention in their desperate effort to defeat his claims. It was all in vain, however, for the decision of the court was in favor of Edison, and his lamp patent was sustained not only by the tribunal of the first resort, but also by the Appellate Court some time afterward.

The first trial was had before Judge Wallace in the United States Circuit Court for the Southern District of New York, and the appeal was heard by Judges Lacombe and Shipman, of the United States Circuit Court of Appeals. Before both tribunals the cause had been fully represented by counsel chosen from among the most eminent representatives of the bar at that time, those representing the Edison interests being the late Clarence A. Seward and Grosvenor P. Lowrey, together with Sherburne Blake Eaton, Albert H. Walker, and Richard N. Dyer. The presentation of the case to the courts had in both instances been marked by masterly and able arguments, elucidated by experiments and demonstrations to educate the judges on technical points. Some appreciation of the magnitude of this case may be gained from the fact that the argument on its first trial employed a great many days, and the minutes covered hundreds of pages of closely typewritten matter, while the argument on appeal required eight days, and was set forth in eight hundred and fifty pages of typewriting. Eliminating all purely forensic eloquence and exparte statements, the addresses of counsel in this celebrated suit are worthy of deep study by an earnest student, for, taken together, they comprise the most concise, authentic, and complete history of the prior state of the art and the development of the incandescent lamp that had been made up to that time. [22]

[22] The argument on appeal was conducted with the dignity and decorum that characterize such a proceeding in that court. There is usually little that savors of humor in the ordinary conduct of a case of this kind, but in the present instance a pertinent story was related by Mr. Lowrey, and it is now reproduced. In the course of his address to the court, Mr. Lowrey said:

"I have to mention the name of one expert whose testimony will, I believe, be found as accurate, as sincere, as straightforward as if it were the preaching of the gospel. I do it with great pleasure, and I ask you to read the testimony of Charles L. Clarke along with that of Thomas A.

Edison. He had rather a hard row to hoe. He is a young gentleman; he is a very well-instructed man in his profession; he is not what I have called in the argument below an expert in the art of testifying, like some of the others, he has not yet become expert; what he may descend to later cannot be known; he entered upon his first experience, I think, with my brother Duncan, who is no trifler when he comes to deal with these questions, and for several months Mr. Clarke was pursued up and down, over a range of suggestions of what he would have thought if he had thought something else had been said at some time when something else was not said."

Mr. Duncan--"I got three pages a day out of him, too."

Mr. Lowrey--"Well, it was a good result. It always recalled to me what I venture now, since my friend breaks in upon me in this rude manner, to tell the court as well ill.u.s.trative of what happened there. It is the story of the pickerel and the roach. My friend, Professor Von Reisenberg, of the University of Ghent, pursued a series of investigations into the capacity of various animals to receive ideas. Among the rest he put a pickerel into a tank containing water, and separated across its middle by a transparent gla.s.s plate, and on the other side he put a red roach. Now your Honors both know how a pickerel loves a red roach, and I have no doubt you will remember that he is a fish of a very low forehead and an unlimited appet.i.te. When this pickerel saw the red roach through the gla.s.s, he made one of those awful dashes which is usually the ruin of whatever stands in its way; but he didn't reach the red roach. He received an impression, doubtless. It was not sufficient, however, to discourage him, and he immediately tried again, and he continued to try for three-quarters of an hour. At the end of three-quarters of an hour he seemed a little shaken and discouraged, and stopped, and the red roach was taken out for that day and the pickerel left. On the succeeding day the red roach was restored, and the pickerel had forgotten the impressions of the first day, and he repeated this again. At the end of the second day the roach was taken out.

This was continued, not through so long a period as the effort to take my friend Clarke and devour him, but for a period of about three weeks. At the end of the three weeks, the time during which the pickerel persisted each day had been shortened and shortened, until it was at last discovered that he didn't try at all. The plate gla.s.s was then removed, and the pickerel and the red roach sailed around together in perfect peace ever afterward. The pickerel doubtless attributed to the roach all this shaking, the rebuff which he had received. And that is about the condition in which my brother Duncan and my friend Clarke were at the end of this examination."

Mr. Duncan--"I notice on the redirect that Mr. Clarke changed his color."

Mr. Lowrey--"Well, perhaps he was a different kind of a roach then; but you didn't succeed in taking him.

"I beg your Honors to read the testimony of Mr. Clarke in the light of the anecdote of the pickerel and the roach."

Owing to long-protracted delays incident to the taking of testimony and preparation for trial, the argument before the United States Circuit Court of Appeals was not had until the late spring of 1892, and its decision in favor of the Edison Lamp patent was filed on October 4, 1892, MORE THAN TWELVE YEARS AFTER THE ISSUANCE OF THE PATENT ITSELF.

As the term of the patent had been limited under the law, because certain foreign patents had been issued to Edison before that in this country, there was now but a short time left for enjoyment of the exclusive rights contemplated by the statute and granted to Edison and his a.s.signs by the terms of the patent itself. A vigorous and aggressive legal campaign was therefore inaugurated by the Edison Electric Light Company against the numerous infringing companies and individuals that had sprung up while the main suit was pending. Old suits were revived and new ones inst.i.tuted. Injunctions were obtained against many old offenders, and it seemed as though the Edison interests were about to come into their own for the brief unexpired term of the fundamental patent, when a new bombsh.e.l.l was dropped into the Edison camp in the shape of an alleged antic.i.p.ation of the invention forty years previously by one Henry Goebel. Thus, in 1893, the litigation was reopened, and a protracted series of stubbornly contested conflicts was fought in the courts.

Goebel's claims were not unknown to the Edison Company, for as far back as 1882 they had been officially brought to its notice coupled with an offer of sale for a few thousand dollars. A very brief examination into their merits, however, sufficed to demonstrate most emphatically that Goebel had never made a practical incandescent lamp, nor had he ever contributed a single idea or device bearing, remotely or directly, on the development of the art. Edison and his company, therefore, rejected the offer unconditionally and declined to enter into any arrangements whatever with Goebel. During the prosecution of the suits in 1893 it transpired that the Goebel claims had also been investigated by the counsel of the defendant company in the princ.i.p.al litigation already related, but although every conceivable defence and antic.i.p.ation had been dragged into the case during the many years of its progress, the alleged Goebel antic.i.p.ation was not even touched upon therein. From this fact it is quite apparent that they placed no credence on its bona fides.

But desperate cases call for desperate remedies. Some of the infringing lamp-manufacturing concerns, which during the long litigation had grown strong and l.u.s.ty, and thus far had not been enjoined by the court, now saw injunctions staring them in the face, and in desperation set up the Goebel so-called antic.i.p.ation as a defence in the suits brought against them.

This German watchmaker, Goebel, located in the East Side of New York City, had undoubtedly been interested, in a desultory kind of way, in simple physical phenomena, and a few trifling experiments made by him some forty or forty-five years previously were magnified and distorted into brilliant and all-comprehensive discoveries and inventions.

Avalanches of affidavits of himself, "his sisters and his cousins and his aunts," practically all persons in ordinary walks of life, and of old friends, contributed a host of recollections that seemed little short of miraculous in their detailed accounts of events of a scientific nature that were said to have occurred so many years before. According to affidavits of Goebel himself and some of his family, nothing that would antic.i.p.ate Edison's claim had been omitted from his work, for he (Goebel) claimed to have employed the all-gla.s.s globe, into which were sealed platinum wires carrying a tenuous carbon filament, from which the occluded gases had been liberated during the process of high exhaustion.

He had even determined upon bamboo as the best material for filaments.

On the face of it he was seemingly gifted with more than human prescience, for in at least one of his exhibit lamps, said to have been made twenty years previously, he claimed to have employed processes which Edison and his a.s.sociates had only developed by several years of experience in making thousands of lamps!

The Goebel story was told by the affidavits in an ingenuous manner, with a wealth of simple homely detail that carried on its face an appearance of truth calculated to deceive the elect, had not the elect been somewhat prepared by their investigation made some eleven years before.

The story was met by the Edison interests with counter-affidavits, showing its utter improbabilities and absurdities from the standpoint of men of science and others versed in the history and practice of the art; also affidavits of other acquaintances and neighbors of Goebel flatly denying the exhibitions he claimed to have made. The issue thus being joined, the legal battle raged over different sections of the country. A number of contumeliously defiant infringers in various cities based fond hopes of immunity upon the success of this Goebel evidence, but were defeated. The att.i.tude of the courts is well represented in the opinion of Judge Colt, rendered in a motion for injunction against the Beacon Vacuum Pump and Electrical Company. The defence alleged the Goebel antic.i.p.ation, in support of which it offered in evidence four lamps, Nos. 1, 2, and 3 purporting to have been made before 1854, and No. 4 before 1872. After a very full review of the facts in the case, and a fair consideration of the defendants' affidavits, Judge Colt in his opinion goes on to say:

"It is extremely improbable that Henry Goebel constructed a practical incandescent lamp in 1854. This is manifest from the history of the art for the past fifty years, the electrical laws which since that time have been discovered as applicable to the incandescent lamp, the imperfect means which then existed for obtaining a vacuum, the high degree of skill necessary in the construction of all its parts, and the crude instruments with which Goebel worked.

"Whether Goebel made the fiddle-bow lamps, 1, 2, and 3, is not necessary to determine. The weight of evidence on this motion is in the direction that he made these lamp or lamps similar in general appearance, though it is manifest that few, if any, of the many witnesses who saw the Goebel lamp could form an accurate judgment of the size of the filament or burner. But a.s.suming they were made, they do not antic.i.p.ate the invention of Edison. At most they were experimental toys used to advertise his telescope, or to flash a light upon his clock, or to attract customers to his shop. They were crudely constructed, and their life was brief. They could not be used for domestic purposes. They were in no proper sense the practical commercial lamp of Edison. The literature of the art is full of better lamps, all of which are held not to antic.i.p.ate the Edison patent.

"As for Lamp No. 4, I cannot but view it with suspicion. It presents a new appearance. The reason given for not introducing it before the hearing is unsatisfactory. This lamp, to my mind, envelops with a cloud of distrust the whole Goebel story. It is simply impossible under the circ.u.mstances to believe that a lamp so constructed could have been made by Goebel before 1872. Nothing in the evidence warrants such a supposition, and other things show it to be untrue. This lamp has a carbon filament, platinum leading-in wires, a good vacuum, and is well sealed and highly finished. It is said that this lamp shows no traces of mercury in the bulb because the mercury was distilled, but Goebel says nothing about distilled mercury in his first affidavit, and twice he speaks of the particles of mercury clinging to the inside of the chamber, and for that reason he constructed a Geissler pump after he moved to 468 Grand Street, which was in 1877. Again, if this lamp has been in his possession since before 1872, as he and his son swear, why was it not shown to Mr. Crosby, of the American Company, when he visited his shop in 1881 and was much interested in his lamps? Why was it not shown to Mr. Curtis, the leading counsel for the defendants in the New York cases, when he was asked to produce a lamp and promised to do so?

Why did not his son take this lamp to Mr. Bull's office in 1892, when he took the old fiddle-bow lamps, 1, 2, and 3? Why did not his son take this lamp to Mr. Eaton's office in 1882, when he tried to negotiate the sale of his father's inventions to the Edison Company? A lamp so constructed and made before 1872 was worth a large sum of money to those interested in defeating the Edison patent like the American Company, and Goebel was not a rich man. Both he and one of his sons were employed in 1881 by the American Company. Why did he not show this lamp to McMahon when he called in the interest of the American Company and talked over the electrical matters? When Mr. Dreyer tried to organize a company in 1882, and procured an option from him of all his inventions relating to electric lighting for which $925 was paid, and when an old lamp of this kind was of vital consequence and would have insured a fortune, why was it not forthcoming? Mr. Dreyer asked Goebel to produce an old lamp, and was especially anxious to find one pending his negotiations with the Edison Company for the sale of Goebel's inventions. Why did he not produce this lamp in his interviews with Bohm, of the American Company, or Moses, of the Edison Company, when it was for his interest to do so?

The value of such an antic.i.p.ation of the Edison lamp was made known to him. He was desirous of realizing upon his inventions. He was proud of his incandescent lamps, and was pleased to talk about them with anybody who would listen. Is it conceivable under all these circ.u.mstances, that he should have had this all-important lamp in his possession from 1872 to 1893, and yet no one have heard of it or seen it except his son? It cannot be said that ignorance of the English language offers an excuse.

He knew English very well although Bohm and Dreyer conversed with him in German. His children spoke English. Neither his ignorance nor his simplicity prevented him from taking out three patents: the first in 1865 for a sewing-machine hemmer, and the last in 1882 for an improvement in incandescent lamps. If he made Lamp No. 4 previous to 1872, why was it not also patented?

"There are other circ.u.mstances which throw doubt on this alleged Goebel antic.i.p.ation. The suit against the United States Electric Lighting Company was brought in the Southern District of New York in 1885. Large interests were at stake, and the main defence to the Edison patent was based on prior inventions. This Goebel claim was then investigated by the leading counsel for the defence, Mr. Curtis. It was further inquired into in 1892, in the case against the Sawyer-Man Company. It was brought to the attention and considered by the Edison Company in 1882. It was at that time known to the American Company, who hoped by this means to defeat the monopoly under the Edison patent. Dreyer tried to organize a company for its purchase. Young Goebel tried to sell it. It must have been known to hundreds of people. And now when the Edison Company after years of litigation, leaving but a short time for the patent to run, have obtained a final adjudication establishing its validity, this claim is again resurrected to defeat the operation of the judgment so obtained. A court in equity should not look with favor on such a defence. Upon the evidence here presented, I agree with the first impression of Mr. Curtis and with the opinion of Mr. d.i.c.kerson that whatever Goebel did must be considered as an abandoned experiment.

"It has often been laid down that a meritorious invention is not to be defeated by something which rests in speculation or experiment, or which is rudimentary or incomplete.

"The law requires not conjecture, but certainty. It is easy after an important invention has gone into public use for persons to come forward with claims that they invented the same thing years before, and to endeavor to establish this by the recollection of witnesses as to events long past. Such evidence is to be received with great caution, and the presumption of novelty arising from the grant of the patent is not to be overcome except upon clear and convincing proof.

"When the defendant company entered upon the manufacture of incandescent lamps in May, 1891, it well knew the consequences which must follow a favorable decision for the Edison Company in the New York case."

The injunction was granted.

Other courts took practically the same view of the Goebel story as was taken by Judge Colt, and the injunctions asked in behalf of the Edison interests were granted on all applications except one in St. Louis, Missouri, in proceedings inst.i.tuted against a strong local concern of that city.

Thus, at the eleventh hour in the life of this important patent, after a long period of costly litigation, Edison and his a.s.sociates were compelled to a.s.sume the defensive against a claimant whose utterly baseless pretensions had already been thoroughly investigated and rejected years before by every interested party, and ultimately, on examination by the courts, p.r.o.nounced legally untenable, if not indeed actually fraudulent. Irritating as it was to be forced into the position of combating a proposition so well known to be preposterous and insincere, there was nothing else to do but to fight this fabrication with all the strenuous and deadly earnestness that would have been brought to bear on a really meritorious defence. Not only did this Goebel episode divert for a long time the energies of the Edison interests from activities in other directions, but the cost of overcoming the extravagantly absurd claims ran up into hundreds of thousands of dollars.

Another quotation from Major Eaton is of interest in this connection:

"Now a word about the Goebel case. I took personal charge of running down this man and his pretensions in the section of the city where he lived and among his old neighbors. They were a typical East Side lot--ignorant, generally stupid, incapable of long memory, but ready to oblige a neighbor and to turn an easy dollar by putting a cross-mark at the bottom of a forthcoming friendly affidavit. I can say in all truth and justice that their testimony was utterly false, and that the lawyers who took it must have known it.

"The Goebel case emphasizes two defects in the court procedure in patent cases. One is that they may be spun out almost interminably, even, possibly, to the end of the life of the patent; the other is that the judge who decides the case does not see the witnesses. That adverse decision at St. Louis would never have been made if the court could have seen the men who swore for Goebel. When I met Mr. F. P. Fish on his return from St. Louis, after he had argued the Edison side, he felt keenly that disadvantage, to say nothing of the hopeless difficulty of educating the court."

In the earliest days of the art, when it was apparent that incandescent lighting had come to stay, the Edison Company was a shining mark at which the shafts of the dishonest were aimed. Many there were who stood ready to furnish affidavits that they or some one else whom they controlled had really invented the lamp, but would obligingly withdraw and leave Edison in possession of the field on payment of money.

Investigation of these cases, however, revealed invariably the purely fraudulent nature of all such offers, which were uniformly declined.

As the incandescent light began to advance rapidly in public favor, the immense proportions of the future market became sufficiently obvious to tempt unauthorized persons to enter the field and become manufacturers.

When the lamp became a thoroughly established article it was not a difficult matter to copy it, especially when there were employees to be hired away at increased pay, and their knowledge utilized by the more unscrupulous of these new compet.i.tors. This is not conjecture but known to be a fact, and the practice continued many years, during which new lamp companies sprang up on every side. Hence, it is not surprising that, on the whole, the Edison lamp litigation was not less remarkable for quant.i.ty than quality. Between eighty and ninety separate suits upon Edison's fundamental lamp and detail patents were brought in the courts of the United States and prosecuted to completion.