30 L. Ed. 392
U.S.
1886
MR. Justice' Bradley

delivered the opinion of the court.

‘ This is a suit on a patent, brought by Wooster, the appellee, against the persons composing the firm of Johnson, Clark and Co., of New York, to restrain them from infringing the patent, and to recover profits and damages. The bill was filed on the 20th of December, 1819, and the’ patent expired fifteen days afterwards. The patent was for folding guides used on sewing machines, and is the same that was involved in the case of Thomson v. Wooster, 114 U. S. 104. It was granted to one Douglas in October, 1858, for a period of fourteen years, was extended in October, 1812, for seven years longer, and -was then, in the same month, surrendered and reissued. The bill does not specify the particular.ground on which the reissued patent was granted, and although the answer avers that' it was unlawfully granted, that the original was surrendered for the purpose of claiming more and other things than were described and claimed in it, and that the reissued patent is not for the same invention for which the original was granted, it does not set out the original, nor was the original put .in evidence in the cause, and no evidence was offered to substantiate the allegations of the answer. The complainant produced the reissued patent in evidence and proved infringement. The defendant adduced evidence -before the examiner, but out of -time, and it was ruled out by the court. A decree was made - establishing the patent, and the infringement thereof by the defendants,- and referring it to a • master to take and state an account of profits, and to assess damages, and-.the defendants were ordered to produce their books, papers, and devices used, so far as related to the matter in issue. Upon this reference, ' the parties entered into a stipulation before the master, by which the defendants admitted that they had purchased .and disposed of 15,000 folding guides covered by the decree, and in consideration thereof the complainant waived all further testimony as to profits received by the defendants therefrom, and . agreed to rely on proof of damages in place of profits. The complainant adduced evidence to show that he had gn established license fee of ten cents for each folding guide purchased or disposed of, and had granted licenses at' that rate to divers sewing machine companies. The master being satisfied with this evidence, reported the damages at $1500. The defendants filed a number of exceptions to the report, none of which were sustained, and a decree was entered for the amount of damages reported. The defendants thereupon appealed.

The points taken by the appellants are :

First. That , the court below, sitting as a court of equity, had no jurisdiction of the case, because the complainant had a ■plain and adéquate remedy at law;.

Second. That the reissue of the patent was illegal by • reason of laches in applying for it.

■Third. That the court erred in finding that'the measure of damages was an established license fee, and that such license fee was proved.

As to the first point, the bill does not show any special ground for equitable relief, except the prayer for an injunction. To this the complainant was entitled, even for the short time the patent had to run, unless tlie court had deemed it improper- to grant it. • If, by the course of the court, no injunction could have been obtained in that time, the bill could very properly have been, dismissed, and ought to have- been: But by the rules of the court in which the suit was brought only-four days’ notice of application for an injunction was required. Whether one was applied for does not appear. But the court had jurisdiction of the case, and could retain the bill-,- if, in its discretion, it -saw fit to do so, which it did. It might have dismissed the bill, if it had deemed it inexpedient to grant an. injunction; but that was a matter in its own sound discretion, and with that discretion it is not our province to interfere, ■ unless it was exercised in-a manner clearly illegal. We see no illegality in the manner of its exercise in this case. The jurisdiction had attached^ and although, after' it attached, the principal ground for issuing an injunction'may have ceased to exist by the expiration of the patent, yet there might be other grounds for the writ arising from the possession by the defendants of folding guides illegally made or procured whilst the patent was in force. . The general allegations of the bill were sufficiently comprehensive to.-meet such a case. But even without that, if the case was one for equitable relief when the suit was instituted, the mere fact that the ground for' such relief expired by the expiration of the patent, would not take . away the jurisdiction, and preclude the court from proceeding to grant the incidental relief which belongs to cases of -that - sort. This has 'often been done in patent causes, and a large number. of cases may be cited to that effect; and there is nothing in the decision in Root v. Railway Co., 105 U. S. 189, to the contrary. Cotton Tie Co. v. Simmons, 106 U. S. 89 ; Lake Shore, &c., Railway v. Car-Brake Co., 110 U. S. 229; Consolidated Valve Co. v. Crosby Valve Co., 113 U. S. 157; Thomson v. Wooster, 114 U. S. 104. It- is true that where a party alleges equitable ground for relief, and the allegations are not sustained, as where a bill is founded on an allegation of fraud, which is not maintained by the proofs, the bill will be dismissed in toto, both as to the relief sought against the alleged fraud, and that which is sought as-incidental thereto.

The point insisted on, that the bill contained no charge of ■ continued infringement, or of infringement at the time .of commencing the suit, if it were material, is .not sustained by the fact. The bill does contain such a charge.

As the court bad jurisdiction at the inception of the suit, even though upon a narrow ground, yet, as the defendants did not ask the dismissal of the bill on the ground of want of jurisdiction, we should be very reluctant, if we had the power, now, on an appeal, after the case has been tried and determined, to reverse the decree.

The second point raised was substantially disposed of in the case of Thomson v. Wooster, qua supra. The allegations in the present bill are the same as they were in that case. Neither the bill nor the proofs show anything from which the court can infer that the reissue was illegally granted; and the allegations of the answer are unsupported by evidence. The reissued patent itself made a prima facie case for the complainant. The allegations of the answer, that it'was issued for the ;mere purpose of expanding the claim of the original, and that it was for another and different invention, should have' been proved. But we have no evidence on the subject,'not even the original patent with which to compare the reissue. This point, therefore, is wholly without foundation.

The third point, as to the measure of damages, and the want of proof thereof, is equally untenable. It is a general rule in patent causes, that established license fees are the best measure of damages that can be used. There may be damages beyond this, such as the expense and trouble the plaintiff has been put to by the defendant; and any special inconvenience he has suffered from the wrongful acts of the defendant; but these are more properly the subjects of allowance by the court, under the authority given to it to increase the damages.

As to the sufficiency of the proof, we see no occasion to disturb the .conclusion reached by tiie master on this point. The complainant proved several instances of licenses given by him to large sewing machine companies, the fees on which were regularly paid, and corresponded with the rate allowed by the master. ."We think that the defendants have no occasion to complain of the amount awarded.

The decree of the Circuit Cowrt is affirmed.