https://patentbrief.org/company/almon-b-strowger Plain-English explanations of patents assigned to Almon B. Strowger, newest first. en-us Sat, 13 Jun 2026 10:08:55 GMT https://patentbrief.org/patent/us/447918/strowger-automatic-telephone-exchange An 1891 patent for an automatic telephone exchange that allowed callers to connect to each other without needing a human operator. Tue, 10 Mar 1891 00:00:00 GMT https://patentbrief.org/patent/us/447918/strowger-automatic-telephone-exchange