This is an appeal by both parties from a decree of the District Court holding claim 19 of United States letters patent No. 946,442, issued, on application filed by E. E. Johnson, January 12, 1906, to the Victor Talking Machine Company January 11, 1910, invalid on the ground that Johnson derived his knowledge of the invention from J. B. Browning and claim 1 of United States letters patent No. 1,402,738, issued to J. B. Browning for the same invention, invalid on tho ground of abandonment.

This invention relates to a talking machine with an amplifying horn inclosed in a cabinet with doors on either side to regulate the sound issuing from the horn, and is embodied in claim 19 of the Johnson patent and claim 1 of the Browning patent, which is now owned by the Brunswick-Balke-Collender Company. The question involved is priority of invention, and this was before the Court of Appeals of the District of Columbia, which decided in favor of the Browning patent on April 4, 1921.

The Victor Talking Machine Company thereafter, February 1, 1922, filed its bill under the provisions of section 4938 of the Eevised Statutes (Comp. St. § 9463) in the District Court for the purpose of having claim 1 of the Browning patent decreed invalid and void. The complete record of the case in the Patent Office and the Court of Appeals of the District of Columbia was not before the District Court, and so is not before us. The learned District Judge held that the testimony before him was not sufficient in character and amount to carry thorough conviction that the conclusion of the Court of Appeals was erroneous, and so under the doctrine of Morgan v. Daniels, 153 U. S. 120, 14 S. Ct. 772, 38 L. Ed. 657, he felt constrained to award priority of invention to Browning.

The Court of Appeals had before it only the issue of priority of invention. In addition to this question, the District Court considered the question of abandonment by Browning. On April 4, 1911, Browning struck from his application for the patent the invention covered by claim 1, and did not reinsert it until June, 1915. Judge Morris held that this unexplained silence for a period of more than four years constituted an abandonment by hiip of the invention. We think his conclusions on both issues are sound, and affirm the decree on his opinion.