This suit relates to Sundback patent 1,557,381, issued on October 13, 1925, on a hookless fastener, now owned by the plaintiff as assignee of the inventor. The patent was an improvement on Sundback patent 1,243,458, issued on October 16, 1917. See Lion Fastener v. Hookless Fastener Co. (C.C.A.3, 1934)
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