https://patentbrief.org/company/john-l-mason Plain-English explanations of patents assigned to John L. Mason, newest first. en-us Sat, 13 Jun 2026 10:08:09 GMT https://patentbrief.org/patent/us/22186/mason-jar An 1858 invention by John L. Mason that introduced a threaded glass jar and a screw-on metal lid to create an airtight seal for home food preservation. Tue, 30 Nov 1858 00:00:00 GMT https://patentbrief.org/patent/us/22186/mason-jar