THOMA et al. v. PERRI et al., 228 F. 904

PUTNAM, Circuit Judge. This is one of the cases which have been quite common in this circuit, wherein a patentee has in one way or another fixed a settled date for his invention,. and some in-fringer undertakes to establish an earlier date. The courts in this circuit, in Brooks v. Sacks, 81 Fed. 403, 26 C. C.

A. 456, decided on June 10, 1897, rejected any such attempt, based upon the unsupported recollections of witnesses, after any considerable length of time had expired, unless supported by concrete facts, and in several cases, some of which are of striking character, enforced that rule, the last case of that kind being Greenwood v. Dover, 194 Fed. 91, 114 C. C. A. 169, decided on December 12, 19,11. In this latter case, the patent had also been sustained by a suit in the Court of Appeals in the District of Columbia, based upon

section 4915 of Revised Statutes (Comp. St. 1913, § 9460). The appeal at bar, in all substantial respects, including the adjudication of the Circuit Court of Appeals in the District of Columbia, coincided with Greenwood v. Dover. It is impossible to establish any positive distinction between Greenwood-v. Dover and the case at bar, and it is beyond doubt, therefore, that we must now affirm the decision of the District Court appealed from. We can see no reason for elaborating our conclusion. The judgment of the District Court is affirmed, and the costs of appeal are awarded to the appellees.