On November 12, 1957, first razor blade counter was patented.
Patent Information
Publication number: US2812575 A
Patent Title: Razor blade counter
Publication type: Grant
Publication date: 12 Nov 1957
Filing date: 4 Nov 1954
Priority date: 4 Nov 1954
Inventors: Abbott John C, Coniglio Benjamin F
Original Assignee: Abbott John C, Coniglio Benjamin F
