Lock
United States Patent 2431894
US Patent References:
Safety device for locks
- - 1364452

Lock
- - 2036738

Cylinder lock
- - 2003086

Locking device
- - 2044534

Lock
- - 2021185


Inventors:
Spain, Roy C.
Publication Date:
12/02/1947
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Assignee:
YALE & TOWNE MFG CO
Primary Class:
70/490
Other Classes:
70/419
International Classes:
E05B27/06
US Patent References:
2004433Lock