Julius Kayser & Co. v. Rosedale Knitting Co.

BUFFINGTON, Circuit Judge.

In the court below the plaintiffs, assignees of patent No. 1,969,307, granted August 7, 1934, to Charles A. Kaufman for “hosiery and the manufacture thereof,” brought suit against defendant charging infringement. On final hearing the trial court held the patent invalid. Thereupon plaintiff took this appeal.

The case concerns the weaving of full fashioned chiffon hosiery devoid of horizontal bands or streaks or, as styled by the trade, “Ringless Stockings”. Such streaks are caused in silk hosiery by the fact that the delicate threads made by silk worms varied in…