155 F. 409 | U.S. Circuit Court for the District of New Jersey | 1907
The mere substitution of one material for another is not, as a rule, patentable. Hotchkiss v. Greenwood, 11 How. 248, 13 L. Ed. 683. Brown v. District of Columbia, 130 U. S. 87, 9 Sup. Ct. 437, 32 L. Ed. 863. But to this there are exceptions. And, while it may not be possible to define just when it is so, it must be recognized that, under some circumstances, the adaptation of certain materials, singly or in combination, to the production of certain desired results, may amount to invention; and that too, even though it involves no more than the taking advantage of certain inherent qualities, developed or discovered experimentally. Smith v. Goodyear Dental Co., 93 U. S. 486, 23 L. Ed. 952; Goodyear Dental Vulcanite Co. v. Davis, 102 U. S. 222, 26 L. Ed. 149; Magowan v. New York Belting Co., 141 U. S. 332, 12 Sup. Ct. 71, 35 L. Ed. 781; Potts v. Creager, 155 U. S. 597, 15 Sup. Ct. 194, 39 L. Ed. 275. This is particularly the case with regard to composite mixtures or alloys of metals, such as is the character of the device in suit, the object of which, as declared by the inventors, was to provide an anti-friction alloy for journal bearings, which should hold up within itself more lead than was theretofore considered possible.
The value of alloys, composed of tin, lead, and copper, for the bearings of railroad cars and engines, had long been recognized, but up to 1892 there had been no attempt at any definite mixture; old brass and copper scrap and shells, of heterogeneous character, being somewhat indiscriminately made use of. About that time, however, as the out
The received idea, however, at the date of the patent, as the result of the Dudley experiments, was that the limit in the diminution of tin and increase of lead had been reached in the relative amounts there determined; the proportion of tin so fixed being supposedly required to hold up the lead, and tin and lead having to be increased together beyond that. But it was discovered by the present inventors that this was not the case, and that, on the contrary, the subject was regulated by a critical relation between the metals involved, by which, with tin at less than 7 per cent, by weight, lead at more than 20 per cent, and the balance, or some 73 per cent, of copper, there was a quick solidification of the mass without the forming of any appreciable eutectic alloy, the large percentage of lead present being held and retained without difficulty, a small percentage of other metals, such as antimony, zinc, iron, etc., to be found in ordinary brass scrap as impurities, being also permitted. The proportions so given, it is to be observed, conform to a critical point in the constitution of copper-tin alloys, on one side of which, according to the relative percentages employed, they solidify or set quickly at a high temperature; and, on the other, by reason of different percentages, they combine differently, forming among other subsidiary compounds certain eutectic mixtures, which remain liquid for a much longer period, cooling slowly. This critical point is a well demonstrated scientific fact, which is generally, if not universally, accepted; and is shown to exist close to where there are 9 parts of tin to 91 of copper, or relatively something over 9 per cent, of the former. Having regard to this, and the consequences which flow from it when lead is additionally intro
The validity of the patent, however, is contested upon several grounds. And the first criticism of it is its indefiniteness. The limitation of tin, as it is said, is given but one way, “less than 7 per cent.,” and of lead, the other, “more than 20 per cent.”; the copper being dependent upon both and varying accordingly. There is nothing certain about this, as it is claimed, admitting of almost endless variety, as it does, and affording no real guide. But that it presents a practical working formula, according to the evidence, there can be no doubt. To one skilled in the art, as is there shown, it teaches that, with tin not exceeding the limit named, lead to the extent of 20 per cent, and upwards can be incorporated — a desirable feature if it could be accomplished as is well known — the proportion of copper being regulated to correspond. By observing these limits, the mixture is kept within the critical point necessary for the avoidance of eutectic alloys and the formation of a homogeneous mass, so that, practically as well as scientifically considered, the directions are sufficiently precise and instructive. Anything more so would admit of evasion and give away the invention, which consists not in the establishment of exact and rigid proportions, but in the discovery and disclosure of the critical relation between tin and copper, required to make possible a high percentage of lead, the terms of the patent being so framed as to appropriate and cover the whole field, copper-tin-lead alloys, as pointed out above, being divided into those where this is possible and those where it is not. Within
It is said, however, that by the nickel patents to the same inventors, issued within three weeks after the application for the patent in suit and there referred to, they are on record as declaring that, not only was tin as low as 6 per cent, possible, but that, by the use of a small amount of nickel not exceeding 1 per cent., the tin could be reduced to three per cent, or even be entirely dispensed with, the lead at the same time being increased, as a desirable feature, as high as 22 per cent., thus in both respects realizing the terms of the patent. But that the desirability of a high per cent, of lead is so suggested is of no significance. This was well known, the difficulty being to accomplish it. Nor does the low per cent, of tin, which is shown in the same connection, bring the case within the patent; this being brought about by the use of the nickel, the declared purpose of the patent in suit being to produce the same result of high lead and low tin without that constituent, the inventors having apparently discovered the ability to do so, while the applications for the nickel patents were pending.
Much stress is laid, however, on the fact that Dr. Dudley, in his "Franklin Institute address in 1892, not only disclosed the desirability of increasing the lead and decreasing the tin, but, as productive of the best results attained by his experiments, gave definite percentages, not far removed from those of the patent, namely, 8 per cent, of tin, 15 per cent, of lead, and 77 per cent, of copper, at the same time suggesting that a further diminution of tin and increase of lead with still better results might be practicable. The advance made upon this, if any, by the present inventors, was thus, according to the argument, not only plainly marked out for them, but was at the best one of degree merely, which is not patentable, the alloy which they have devised having no different characteristics, physically or chemically, from that produced and described by Dr. Dudley. But, however close the proportions of the two may seem to be, those given by Dr. Dudley are in fact outside of the patent, and beyond the critical relation which is there disclosed and declared for. And while it is true that Dr. Dudley did suggest possibilities tending to a still further approach to it, intimating that the question had not perhaps been finally disposed of, his own experiments in that direction were not successful, leading him to the conclusion that the limit in all probability had been reached, and that, as one function of the tin was to hold up the lead, upon the lead being increased the tin had to be also, a mistake, shared by others, which impeded rather than promoted a discovery. Dr. Dudley also concedes that the successful production by these inventors of an alloy for railroad bearings, containing so little tin and so high lead, not theretofore deemed practicable, involved invention, although at an earlier stage, when less
Neither is there in the various anticipations charged. It is said, for instance, that á bronze coin of the Atilia family of the date of 45 B. C., an analysis of. which was given in a work on mixed metals and metallic alloys, published by A. H. Hiorns in 1890, was made of a composition within the terms of the patent; there being 4.77 per cent, of tin, 25.43 per cent, of lead and 68.72 per cent, of copper. But an ancient coin is no guide for a modern railroad journal, and a disclosure with respect to the one teaches nothing of value as to the other. Conceding, therefore, that the analysis so published shows that an alloy of the character given could be successfully coined, it was not to be assumed that it could be made use of under the very different conditions which obtain in the case of a journal bearing.
It is further said that the Hahn (1873) British patent is for a copper-tin-lead alloy, which is suggested as suitable, among other things, for anti-friction bearings, the copper being stated at from 70 to 73 per cent., the tin from 9 to 11 per cent., and the lead from 15 to 20 per cent., with zinc from % to 1 per cent. But on this there is no occasion to dwell. Not only is it outside of the proportions named in the patent and the critical relation upon which these are based, but it does not approach by a considerable so near as Dr. Dudley did, and, if his experiments did not anticipate, neither by so much the more does this.
The Vaughan (1874) British patent stands no differently. It too
So, also, is the Hewitt (1901), besides which it is later in date than the patent in suit, from which time alone it takes effect as a publication. Bates v. Coe, 98 U. S. 31, 25 L. Ed. 68; Diamond Drill Co. v. Kelley (C. C.) 120 Fed. 282. And, even assuming that the date of the application, which is earlier, could be considered, it amounts to no more than the other patents referred to, if so much, it being doubtful, also, whether it states anything practicable.
This brings us to the real issue in the case, which is more serious— the alleged prior knowledge and use of the invention by the Brady Metal Company, with which Mr. Brady, the president of the defendant company, was formerly associated. The contention is that in, April, 1896, some four years before the application for the present patent, the Brady Metal Company, which was an extensive manufacturer of railroad bearings, made a successful casting of substantially the same proportions of tin, lead, and copper, as are now practiced by the defendants within the terms of the patent, and continued to make use of the same from that time on, as have the Brady Brass Company succeeding them. This, if established, is, of course, the end of the patent, the novelty of which it effectively negatives. There can be no question, under the evidence, that at the date stated the Brady Metal Company did make a journal composed of copper, tin, and lead in the proportions suggested. This is proved by documentary evidence which cannot be controverted, the original letters from the metallurgical chemists who made the analysis having been produced, where the copper is given at 65.29 per cent., the tin at 7.54 per cent., and the lead at 26.56 per cent., with traces of zinc and iron which are not material, the percentage of tin being subsequently corrected and reduced to 5.93, by taking out the antimony which had been inadvertently included. But while a single previous knowledge or use, such as this, may be enough to negative novelty (Coffin v. Ogden, 18 Wall. 120, 21 L. Ed. 821; Daniel v. Restein [C. C.] 131 Fed. 469), the use must be something more than an accidental or casual one (Tilghman v. Proctor, 102 U. S. 707, 26 L. Ed. 279). It must, indeed, be so far understood and practiced or persisted in as to become an established
But, comprehensive as this testimony may seem to be, upon examining it critically, it does not stand the test; its deficiencies not being disclosed in this résumé of it. The principal difficulty with it is that it deals in generalities, without much knowledge. Mr. Brady, as he has to admit, only knew in a broad way what was going on at the works, for which he had- to rely on Mr. Onslow, the superintendent, his own office being elsewhere. That which they were striving for, as he says, was a cheap, low-grade bearing, such evidently as would satisfy the trade, and allow them to compete successfully with others, rather than one of any particular excellence. The piece sent to the chemists for analysis was not selected upon any such account as is stated by Mr. Brady, but, as is shown by the letter
Nor is this materially improved by the testimony of Mr. Reubens or Mr. Adams, which is not, of course, to be lost sight of. The knowledge of the former beyond that of Mr. Brady may be doubted. As assistant to the president, and his stenographer, he was no more likely to be acquainted with what was going on at the works than his superior. And while, as chemist, which he also seems to have been, he may have been in shape to make analyses, as well as to interpret them, there is nothing, to prove that, he ever did anything for the company in this line. He does say that he talked over with Mr. Onslow, from time.to time, the percentages of tin and lead which were being used,, and he is satisfied from this, as he says, and the one particular analysis which was made, that the directions for more lead and- less tin- were being followed. The statements of Mr. Onslow, as to what'he was doing, are mere hearsay, and, of course, not evidence. But, accepting what passed between them in this way as indicative of what was desired and was being aimed at, it amounts to no more than that they were striving for as little tin and as much lead as was practicable, which may be conceded; that being the wish of every one. It is no proof, however, of the actual percentages successfully realized, and by the analyses made in July, 1896, of some of the products of these works by the same parties who made the earlier one in April, lead and tin are shown by no means within the proportions now claimed, to say nothing of the large per cent, of zinc present, thus proving that, notwithstanding the disclosure made by the first analysis, it had up to that time resulted in no ’confirmed knowledge or practice such as is set up, which naturally throws doubt as to any that followed.
It is true that in the testimony of Mr. Adams we apparently have something more specific. He was assistant superintendent under Mr-. Onslow, and thus presumably acquainted with what was being done. And he states, positively and definitely, that -at both the Brady •Metal Company and the Brady Brass Company, .where he was also employed as superintendent,- as high as 30 per cent, of lead, ánd as low as 5 per cent, of tin, were successfully employed in making bearing alloys. But neither does this bear the requisite scrutiny. The only way that he can swear do it, as he’ says, is that upon one occasion he weighed out 30 pounds of lead himself and put .it into the crucible. But, without holding him down to any .such particularity, he..admits that, as a matter of general practice, they were making use ¡of composition-scrap,'consisting óf copper'shells, turnings,-old oil cups, castings, “and .such-stuff,” ¡as much lead being put.in5aSiithey-c0.uld.hold .up..- , .But...íhi$,.is<.gus.t5.the¡ indiscriminate way--that, every .qnp,. qise; .wj^s
Nor is this all that there is to be said upon this subject. When Brady and Reubens were on the witness stand, they were asked who there was who would confirm their statements with regard to the practice at the works, and the percentages of tin and lead which were made use of, and they both declared, without naming any one, that they would be known to some of the workmen. But in flat contradiction of this those of thé workmen who would be likely to be informed, if any, upon being called by the complainants, professed that they knew nothing of any such practice as had been testified to. Mr. Wilmerding, for instance, went to work in the defendants’ foundry in June, 1901, in order to familiarize himself with the various products of the company, so as to qualify as a salesman; and became acquainted, through foundry slips, with the component pails of the different mixtures, one of which slips he produced, together with a memorandum book in which the various formulas made use of at the time by the Brady Brass Company were entered, and, so far as his acquáintance went, the company, as he says, never made or sold a metal having more than 20 per cent, lead and less than 7 per cent, tin and the balance copper. Defendants say that he was only four weeks in the foundry, and but four or five months with the company all told. But, considering the object he had in view in going into 'the foundry, it is hardly credible,that he would not have, become informed of a bearing mixture of; such superior quality.
Hermann Bunje also worked for the Brady Metal Company from ,1892 to 1899, tending to the fires, and putting the metal into the pots to be melted down. The general specifications, as he says, called for 100 lbs. of copper, 15 of tin, and 15 of lead, which represented the common practice. There was also another mixture of 77 of copper, 13 of lead, and 10 of tin; but never anything of over 20 pounds of lead, with less than 7 pounds of tin, in a 100-pound mixture. •There were besides- this other make-ups, of turnings and old bearings or brasses, with the latter of which 15 or 20 pounds of shells — a bundle to a pot — were used, and sometimes sheet copper and shells. But this was in the old shop (which they left in the fall of 1896), and did not turn out well and was not continued steadily, the sheet and copper shells doing the best. James Heavey, an experienced molder, already spoken of, now working for the complainants, was also employed in the fall of 1899 by the Brady Brass Company, and he confirms the others that they did not while he was there use more than 15 per cent, of lead in their copper-tin-lead alloys, and did make use of the other mixtures which have been given. But he only worked there about four weeks, and his means of knowledge were correspondingly limited; the valué of his testimony being thus in its corroboration of the others.
Summing up, therefore, the conclusions reached upon this branch of the case, both on account of the unsatisfactory character of the evidence produced by the defendants, as well as because of this direct contradiction of it, the alleged prior knowledge and use which is set up cannot be sustained. The temptation to resort to a defense of this kind in patent cases is always great, and parties are held in consequence to the most convincing and stringent proof. Deering v. Winona Harvester Works, 155 U. S. 286, 15 Sup. Ct. 118, 39 L. Ed. 153.
Let a decree be drawn in favor of the complainants, sustaining the patent, and directing an account, with costs.
Specially assigned.
This letter was not put in evidence at the hearing before the examiner, but was produced by the defendants upon call by the court, and is treated as though it were regularly offered.