https://patentbrief.org/company/hookless-fastener-co Plain-English explanations of patents assigned to Hookless Fastener Co, newest first. en-us Sun, 12 Jul 2026 09:29:34 GMT https://patentbrief.org/patent/us/1219881/zipper-separable-fastener The 1917 patent for the separable fastener that perfected the design of the modern zipper using interlocking teeth on two flexible tapes. Tue, 20 Mar 1917 00:00:00 GMT https://patentbrief.org/patent/us/1219881/zipper-separable-fastener