Title:
TWO-KEY LOCK
United States Patent 3473355
US Patent References:
/0396628.html
- - 0396628

Pin-tumbler lock
- - 1565557

Lock
- - 2009640

Cylinder lock
- - 2113007

Combination locks
- - 3090219


Inventors:
Saito, Toshizumi
Publication Date:
10/21/1969
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Assignee:
Toshizumi, Saito
Primary Class:
70/339
Other Classes:
70/384
International Classes:
E05B35/12; E05B35/00; E05B25/00; E05B35/12




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