US Patent 1,180,256 · 18 Apr 1916

Round door with interlocking lugs

by Sherman L. Cary

Patent drawing of a round-door safe on a pedestal base, with sections showing the locking lugs around the circular door opening
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Sherman L. Cary's patent for a round-door safe with interlocking lugs, US 1,180,256 (1916), assigned to the Cary Safe Company. Public domain (US patent drawing).

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