This case came on to be heard upon the record and briefs and oral argument of counsel;

And it appearing that in the matter appealed from the District Court dismissed the complaint on the ground that the court lacked jurisdiction of the controversy ;

And it appearing that while the complaint prays for declaratory judgment and injunction, the primary and controlling purpose of the action is to secure a judgment directing the appellee to transfer to the appellant the entire legal title in Patent No. 255,975, Cf. Dill Mfg. Co. v. Goff, 6 Cir., 125 F.2d 676, cer-tiorari denied 317 U.S. 672, 63 S.Ct. 77, 87 L.Ed. 540;

And it appearing that the federal courts have exclusive jurisdiction of all cases arising under the patent laws, but not of all questions in which a patent may be the subject matter of the controversy, and that courts of a state may try questions of title to patents, New Marshall Engine Co. v. Marshall Engine Co., 223 U.S. 473, 32 S.Ct. 238, 56 L.Ed. 513;

And it appearing that the Declaratory Judgments Act, 28 U.S.C.A. §§ 2201, 2202, does not confer jurisdiction merely by reason of the existence of a controversy, and jurisdiction must be found in some other statute, Magic Foam Sales Corp v. Mystic Foam Corp., 6 Cir., 167 F.2d 88, 91;

It is ordered that the judgment of the District Court be and it is hereby affirmed.