https://patentbrief.org/company/arnold-o-beckman Plain-English explanations of patents assigned to Arnold O. Beckman, newest first. en-us Sat, 13 Jun 2026 10:09:16 GMT https://patentbrief.org/patent/us/2058761/ph-meter-beckman A 1936 invention by Arnold Beckman that created the first reliable, portable device for measuring the acidity of chemical solutions using electronic sensors. Tue, 27 Oct 1936 00:00:00 GMT https://patentbrief.org/patent/us/2058761/ph-meter-beckman