1920s; Johnson Automobile Lock Co. - Chicago

Five original United States patent document sets issued to Colvin L. Johnson and assigned to the Johnson Automobile Lock Co., representing a tightly grouped archive of early automotive locking and security innovations. Each set retains its original string-bound construction with blue ribbon ties and intact embossed red patent seals, paired with printed certificates and accompanying specification sheets.

The documents feature engraved patent certificates with classical borders and official United States Patent Office insignia, alongside detailed mechanical drawings illustrating locking cylinders, armored cable systems, spare tire locks, and anti-theft mechanisms. Patent numbers visible include examples such as 1,326,270, 1,380,719, and 1,681,409, with filing and issue dates spanning the late 1910s through the 1920s. The drawings emphasize sectional views and functional assemblies-threaded cores, locking pins, cable housings, and wheel-mounted devices-reflecting practical engineering solutions tailored to the rapidly expanding automobile market. Together, the group documents a focused period of innovation in vehicle security, capturing both the legal and mechanical frameworks behind early anti-theft technology.

Shows moderate age and handling wear throughout including edge wear, corner creasing, light toning, and scattered surface soiling. Minor tears at margins and fold lines are present, consistent with archival handling; seals, ribbons, and bindings remain largely intact.

8" W x 12.25" H each

MM - C-20025 - 040226

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