Majority — Brown J.
Syllabus
APPEAL EKOM THE CIKCÜIT COURT.OP THE UNITED STATES POR THE ■ EASTERN DISTRICT OP PENNSYLVANIA.after stating the case, delivered the opinion of the court.
About three months prior to the patent in suit, and on April 16, 1872, another patent, numbered 125,684, was issued to Elijah and John McCreary, for “an improvement in steering devices for canal boats,” etc., which covered a similar coupling together of boats, barges and scows by means of a vertical groove forméd in the overhanging stern guard or bumper of the forward boat, which groove was entered by the cutwater of the rear boat, a chain being used for connecting the boats, which chain was so connected with a train of gear-wheels placed in the rear boat as to enable both boats to be steered by means of a windlass. The first claim of this patent was as follows:
“ 1. Two boats or barges, A and B, fitted together by means of a projecting cutwater fitting into a.notch in an overhanging guard, as described, and coupled and steered by means of a
cnain or rope, having its.ends fastened to the forward-boat and passing around pulleys,". . . 'substantially as herein set forth.”'
The second claim was immaterial.
In patent, numbered 329,844 the.patentee stated that his-improvement upon the prior patent consisted “in substituting for the projecting cutwater and notch, described in said patent for centring the boats together, and forming a universal joint, a chain attached at both ends to one boat, and at its centre to a central point on the adjacent end of the other boat,” etc.
One of the main difficulties in the assessment of damages in .this case arises from the fact that the two patents, the first one of which-is not included in this bill, describe a system of coupling together two boats by means of. chains and a centring device much the same -r- differing from each other only in two particulars: First, in the earlier patent, the two boats are connected together by the cutwater.of the rear boat fitting a groove in the overhanging guard of the forward boat; while in the later patent, there is substituted for this a chain attached by both ends to the forward boat, and at its centre to a central' point oh the adjacent end of the rear boat. Second, in the later patent, the centre of the chain is wound around a horizontal windlass, while in the earlier it is wound around a separate wheel geared to.the windlass below the deck — a difference which it was not insisted was material. In this connection, the. master found thatthe combination of the patent in suit and that of .the prior patent are practically identical in function and result, and are identical in constitution, save only as to .one particular element, the ‘centring’ device. As, therefore, the combination of the patent in suit is one, the sole invention and novelty of which consisted of á single element, the profit which complainant is entitled to recover from the defendant in this case is that which he may have shown to have accrued to •it from the use of substantially that new element in substan- ’ tially the combination in which he has described and claimed it.” Exception, was taken to- this finding, upon the ground that the finding contained an “ erroneous construction of law,
The master found, however,, in this connection, that complainant was not entitled, upon the proofs, to recover from the defendant as its profits from the use of his “improvement” the entire savings in freight accruing from the shipping of coal in the infringing coupled boats in place of single boats, but was restricted to such as were attributable solely to the improvement.
There is no doubt of the general principle that, in estimating the profits the defendant has made by the use of the plaintiff’s device, where such device is a mere improvement upon what was known before, and was open to the defendant to use, the plaintiff is limited to such profits as have arisen from the use of the improvement over what the defendant might have made by the use of that or other'devices without such improvements. This is a familiar doctrine announced by this court in a number of cases. Seymour v. McCormick, 16 How. 480 ; Mowry v. Whitney, 14 Wall. 620 ; Littlefield v. Perry, 21 Wall. 205 ; Elizabeth v. Pavement Co., 97 U. S. 126 ; Garretson v. Clark, 111 U. S. 120 .
The important question in this connection'is, whether, in considering what was already known, and open to the defendant to' use, we are to include the device shown in patent numbered 125,684, issued to Elijah and John McCreary about three months before the patent in suit. There were other methods of connecting vessels in train, such as were disclosed in the British patent to Taylor of 1846 ; the British patent to Bourne
There is nothing, however, to show that the device described in the patent of. April 16, 1872, to the McCrearys, was not an operative device, and if it were open to the defendant to use, the plaintiff, in this action, would be limited in his recovery to the profits which the defendant made by the use of the, improvement described in the' second patent, over the device shown in the earlier' patent. This improvement, as before stated, consisted principally in substituting for the projecting Cutwater and .notch,.described in the earlier patent, a chain attached at both ends to one b.oat, and at its centre to. a central point upon the adjacent end of the other boat. No attempt was made to distinguish or separate the profits arising from this improvement, the testimony being directed only to showing the profits defendant made by the-use of coupled boats in the place of single boats. There was evidence tending strongly to show that the transportation of coal in double boats was more economically effected than in single boats, but none that the second patent was superior to the first. Indeed, the plaintiff admitted, in his argument, that the patent of April 16 described a plan of coupling and steering very little inferior to that described in the patent sued upon, and that, if defendant had pirated that invention, instead of this, the same result in profits or savings would have been' realized. Plaintiff, however, contended in this connection, that in determining the state, of the art, or what Was open to the defendant to use, the invention disclosed in the earlier patent to the McCrearys
Suppose; for example, this patent had belonged to another person, and the plaintiff, foreseeing that the defendant would, .upon this hearing, claim that it was open to him, had purchased it and taken an assignment of all claims for "past infringements, could he in this way forestall such defence? Clearly not. In such case the defendant might justly reply: “ I was summoned here to answer a charge of infringing your patent# and in case it is established to pay such damages as may be awarded for such infringement. But I could not anticipate that you would purchase another patent and set it up in aggravation of such damages.” But if this could not be done pending the suit, it is difficult to see how it could be done before suit brought, if such patent be not made the basis of the suit. Had the defendant attempted to justify by setting up a device obtained subsequent to the date of the plain
The case of Seymour v. McCormick, 16 How. 480 , while not exactly in point, is somewhat analogous to the one under consideration. This was an action at common law to recover damages for the infringement of certain improvements in reaping machines. There were three patents issued, in 1834, 1845 and 1847; the earliest of these patents had expired. The first count charged an infringement of the patent of 1845; the second that of 1847. The plaintiff, to avoid delay,, consented to go to trial on the second count only, .which was for an improvement upon prior patents, consisting chiefly in giving to the raker of the grain a convenient seat upon the machine. The court permitted the jury to assess-the damages as for the infringement of the entire machine, defendant insisting that he was liable only for the damages occasioned by the infringement of the improvement — in other words, that the plaintiff had the. right to recover as great damages for the infringement of the patent set forth in the second count as if he had proceeded upon both counts, and shown infringement of all the patents claimed. The case was removed to this court by writ of error, and the plaintiff in error argued that, for the purposes of that suit, the defendant had a perfectly lawful right to use the machine described in the patent of 1834, (which had, in fact, become public property,},and the improvements in the patent of 1845, and a large portion of those included in that of 1847. These covered the whole of the improved reaper, except what related to the seat, and its combination with the reel. He further claimed that, as the plaintiff had decided not to proceed, on his patent of 1845, that was in effect public .property; that by waiving any right to proceed upon the first claim of his patent of 1847, he had limited himself to the seat, combined with the reel; and that
If plaintiff be unable to recover damages for the infringement of a patent originally included in a suit, but upon which he elects not to proceed, it is difficult to see how he can recover for the infringement of one not made the basis of any action at all. It is true that the combination of the earlier patent in this case is substantially contained'in the later. If it be identical with it or only a colorable variation from it, the second patent would be void, as a patentee cannot take out two patents for the . same invention. James v. Campbell, 104 U. S. 356 . If it be for a different device, then plaintiff could not recover damages for its infringement without making it the basis of suit.
¥e think, therefore, that for the purposes of this suit the earlier patent must be deemed open to the defendant, and no damages having been proved for the infringement of the improvement under the later patent, considered separately, the finding of the court below was correct.
“We do not wish to be understood as expressing an opinion, whether, if there had been an earlier patent for coupling vessels outstanding at the date of this infringement, and owned
The decree of the court below must be
Affirmed.
Mr. Justice Bradley and Mr. Justice Gray were not present at the argument, and took no part in the decision of this case.
Cases cited
- Seymour v. McCormick 16 How. 480 p. 463, p. 466
- Mowry v. Whitney 14 Wall. 620 p. 463
- Littlefield v. Perry 21 Wall. 205 p. 463
- Elizabeth v. Pavement Co. 97 U. S. 126 p. 463
- Garretson v. Clark 111 U. S. 120 p. 463
- James v. Campbell 104 U. S. 356 p. 467