"(Sec. 36.) That any such court or judge thereof shall have power, upon bill in equity filed by any party aggrieved, to grant injunctions to prevent and restrain the violation of any right secured by said laws, according to the course and principles of courts of equity, on such terms as said court or judge may deem reasonable. Any injunction that may be granted restraining and enjoining the doing of anything forbidden by this Act may be served on the parties against whom such injunction may be granted anywhere in the United States, and shall be operative throughout the United States and be enforceable by proceedings in contempt or otherwise by any other court or judge possessing jurisdiction of the defendants. "(Sec. 37.) That the clerk of the court, or judge granting the injunction, shall, when required so to do by the court hearing the application to enforce said injunction, transmit without delay to said court a certified copy of all the papers in said cause that are on file in his office. {Sidenote: Appeal} "(Sec. 38.) That the orders, judgments, or decrees of any court mentioned in section thirty-four of this Act arising under the copyright laws of the United States may be reviewed on appeal or writ of error in the manner and to the extent now provided by law for the review of cases determined in said courts, respectively. {Sidenote: No criminal proceedings after three years} "(Sec. 39.) That no criminal proceeding shall be maintained under the provisions of this Act unless the same is commenced within three years after the cause of action arose." {Sidenote: Strict compliance requisite}