Cylindrical and Tubular

/Cylindrical and Tubular

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