Title:
Tamperproof cylinder lock
Document Type and Number:
United States Patent 3418833
Inventors:
Kerr, William J.
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Publication Date:
12/31/1968
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Referenced by:
Export Citation:
Assignee:
CHICAGO LOCK CO
Primary Class:
Other Classes:
70/389, 70/406, 250/396R
International Classes:
E05B29/04
US Patent References:
Foreign References:
| GB639171A |