This suit in equity is brought to obtain an-injunction against the defendants by reason of their infringement of certain letters patent. The bill alleges the infringement of several' patents relating to the art of bridge construction, arch construction, masonry', and concrete structures. It contains the usual allegations-that the complainant is the owner of the several enumerated patents,, and that they are of great commercial value. It then proceeds to set forth that against the will of the complainant, in violation of his-rights, and in infringement of his letters patent, the defendants submitted a bid for the erection of a certain bridge at Dover and Eoxcroft, in the state of Maine, by plans and specifications embodying the patented inventions of the complainant, and, after being awarded the contract,, proceeded to erect the bridge, and that the same is in process of. construction in accordance with the improvements described in the letters patent. Among other things the complainant further alleges that he fears that, unless the defendants are restrained by a. writ of injunction, they will complete the erection of the bridge, and will cause irreparable injury, to the complainant. The complainant prays, among other things that the defendants may be decreed to account for profits and damages, and that they may be restrained both temporarily and permanently by an injunction of the court from using or selling the improvements described in the letters, patent; that there may be a decree that the patents are valid, and that the complainant is' the lawful owner of the same; that the construction, use, or sale by the defendants of structures embodying the invention may be decreed to be an infringement of the patents; and that the court may cause the damages to be assessed, and may increase the actual damages to-three times the amount of such assessment, by reason of the circumstances of the aggravated infringement by the defendants.
The answer, denies that the complainant is the owner of the patents, that there has been any infringement, and that there is any necessity for an injunction; also that the defendants will receive profits-from any use of the invention. By way of defense it sets forth that defendants entered into a contract with the National Bridge Com
[1] The case shows that a contract was entered into between the defendants as contractors and the town of Foxcroft covering the erection of a bridge over the Piscataquis river between Dover and Fox-croft, and that it included a set of specifications furnished by the National Bridge Company, agreeing to furnish the plans and steel, and a license to use certain pajtents owned or controlled by the Bridge Company under specified conditions. The evidence makes it clear that the bridge was to be erected under plans and specifications covered by letters patent owned or controlled by the Bridge Company; that the company was not to bid on the work, but was to furnish a license to the defendants, the contractors, to erect this bridge for 10 per cent, of the contract price. The contractors were to acquire no license under the patents owned or controlled by the Bridge Company through any act of the company, or its agents, until the specified amount of the license fee had been paid to the Bridge Company. It appears that, should any conditions prevent the prosecution of the work to completion in the time named, or should its prosecution be delayed by the owner of the patents, or by other causes beyond the control of the contractors, then an extension of time should be allowed
[2] The allegations in the bill relating to the infringement of the patents are not sustained. The whole testimony leads me to conclude that the defendants had an implied license to the use of the patents in the way they were using them under the contract, and that they acquired such license by the knowledge and acquiescence of the complainant. No form of words is necessary to constitute a license or permission to use patents. The federal courts have repeatedly applied the law relating to an implied license, on principles based upon the doctrine of acquiescence or estoppel. Walker on Patents (4th Ed., 1904) § 312; Hartell v. Tilghman, 99 U. S. 547, 25 L. Ed. 357; Keyes v. Eureka Mining Co., 158 U. S. 153, 15 Sup. Ct. 772, 39 L. Ed. 929; Seibert Cylinder Oil Cup Co. v. Detroit Lubricator Co. (C. C.) 34 Fed. 216; Blanchard v. Sprague, 1 Cliff. 288, 298, Fed. Cas. No. 1,516; Am. Graphophone Co. v. Victor Talking Machine Co., 188 Fed. 428, 429, 110 C. C. A. 308; Chadeloid Chemical Co. v. Johnson, 203 Fed. 993, 994, 122 C. C. A. 293.
In the case at bar, there is no denial of the validity of complainant’s patents, nor of his right to the monopoly which they give him. The conduct of the parties, as shown by the evidence, discloses the intention of all concerned in the transaction that the patents should be used by the defendants until the bridge was fully constructed. The time of final payment of the amount due by the defendants had clearly been extended until the bridge had been fully constructed, and the terms of the contract had been carried out. The complainant had clearly acquiesced in the acts of the Bridge Company in extending the time of final payment. There is no more reason for allowing him to ignore the terms of the contract, and the rights acquired under it, than there is for allowing the Bridge Company itself to ignore those conditions. The evidence in the case shows that the complainant has. waived his rights to invoke the provision of the contract negativing the acquirement of a license by any act of the company or its agents until the full amount had been paid to the Bridge Company. It is evident that all parties understood that the defendants should have the use of the patents until the bridge should be built. After a careful consideration of all the testimony, I find that, at the time this bill was brought, the complainant had no right to treat the defendants as infringers of the patents in suit.
The bill is dismissed, with costs to the defendants.