https://patentbrief.org/company/hamilton-watch-co Plain-English explanations of patents assigned to Hamilton Watch Co, newest first. en-us Sat, 13 Jun 2026 10:09:16 GMT https://patentbrief.org/patent/us/3672155/digital-watch-pulsar Hamilton's 1972 patent for a digital watch that uses electronic circuits and light-emitting diodes (LEDs) to show time, instead of gears and hands, powered by a rechargeable battery. Tue, 27 Jun 1972 00:00:00 GMT https://patentbrief.org/patent/us/3672155/digital-watch-pulsar