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Patents That Shaped American Locksmithing, Part 3: Walter R. Schlage’s Cylindrical Lock

Patent Number: 1,674,841 (Google Patents) Filing Date: August [...]

By | 2018-10-14T10:08:09-04:00 March 12th, 2018|All, Cylindrical and Tubular, History, Locks|2 Comments

Patents That Shaped American Locksmithing, Part 2: Frank Ellison Best’s Interchangeable Core

Patent Number: 1,561,771 (Google Patents) Filing Date: March 18, 1922 [...]

By | 2018-10-14T10:04:54-04:00 February 19th, 2018|All, Cores and Cylinders, History, Locks|0 Comments