This is an appeal from an order granting a preliminary injunction restraining the infringement of copyrights in certain elementary arithmetics. The case made by the bill, and which the proofs submitted on the motion for the injunction tended to sustain, is this: The defendant, Lizzie E. Wooster, is the author of the books and has the legal title to the copyrights. The equitable tide, however, is in the complainant, Crane & Co., by virtue of a written contract with Wooster whereby, before the copyrights were completed, she transferred to that company the exclusive right to print, publish, and vend the books during the full terms of the copyrights and of any renewals of them, and agreed to defend the copyrights in case of adverse claims or infringements. After the completion of the copyrights Wooster, without the consent of the complainant, prepared other elementary arithmetics, which were largely copied from the copyrighted books, and caused them to be printed and put on the market. The defendants Alford and Shirer are booksellers and are engaged in selling the infringing books without the *516consent of the complainant, and with notice of its rights. The prayer of the bill is for an injunction against further infringement of the copyrights and for such other relief as may be agreeable to equity.
Of the contentions made by the appellants, those which we deem it appropriate to notice at this time are: (1) That the suit is one arising out of the contract and not under the copyright laws; (2) that the complainant, not having the legal title to the copyrights, cannot maintain the suit in its own name, or at least not against others than Wooster; (3) that the complainant has been guilty of laches, barring its right to relief in equity.
1. A suit, the primary _and controlling purpose of which is to enforce a right secured by the copyright laws which is being infringed by the defendants, is a suit under those laws, and within the jurisdiction of the federal Circuit Courts, although it incidentally draws in question the validity, interpretation, and effect of a contract through which the complainant derives title. Littlefield v. Perry, 21 Wall. 205, 222, 22 L. Ed. 577; Excelsior Wooden Pipe Co. v. Pacific Bridge Co., 185 U. S. 282, 290-295; 22 Sup. Ct. 681, 46 L. Ed. 910; Atherton Mach. Co. v. Atwood-Morrison Co., 43 C. C. A. 72, 102 Fed. 949; Victor Talking Machine Co. v. The Fair, 61 C. C. A. 58, 123 Fed. 424. This is such a suit. The bill, like ordinary bills for infringement, sets forth the facts showing the validity of the copyrights, the title of the complainant, and the infringement by the defendants, and then prays for an injunction against a continuance of the infringement. The contract is set forth for the purpose of showing the complainant’s title, and not as. the basis or foundation of the suit.
2. It is the general rule that a mere licensee cannot in its own name sue strangers who infringe. Birdsell v. Shaliol, 112 U. S. 485, 5 Sup. Ct. 244, 28 L. Ed. 768. Here, however, the complainant is not a mere licensee, but has the full equitable title, and Wooster, who has the legal title, is one of the infringers and occupies a position altogether hostile to the complainant. Its right in this situation to sue in equity in its own name is plain in principle and well established by authority. Littlefield v. Perry, 21 Wall. 205, 223; 22 L. Ed. 577; Waterman v. Mackenzie, 138 U. S. 252, 255, 11 Sup. Ct. 334, 34 L. Ed. 923; Excelsior Wooden Pipe Co. v. Pacific Bridge Co., 185 U. S. 282, 22 Sup. Ct. 681, 46 L. Ed. 910; Root v. Railway Co., 105 U. S. 189, 216; 26 L. Ed. 975; Little v. Gould, 15 Fed. Cas. 604, 610, No. 8,395; Id., 15 Fed. Cas. 612, 614, No. 8,395; Ruggles v. Eddy, 20 Fed. Cas. 1317, No. 12,177.
3. The laches sought to be imputed to the complainant consists in its failure to institute the suit until the defendants had been proceeding openly with their infringement for about a year. The delay, however, is satisfactorily explained. The complainant was actively engaged in the defense of a suit prosecuted by Wooster in one of the courts of the state of Kansas to obtain a cancellation of the contract which made it the equitable owner of the copyrights. It obtained a judgment in its favor in that suit, and shortly thereafter commenced the present one, and at once applied for a temporary injunction. The *517circumstances, therefore, refute rather than suggest an acquiesence in the infringement or an abandonment of the copyrights.
Other matters are discussed in the briefs, but careful consideration of them does not persuade us that the court acted improvidently in granting the injunction.
Affirmed.