Title:
Identification system for keys
United States Patent 1816642


Inventors:
Fetter, Harry H.
Application Number:
US51735731A
Publication Date:
07/28/1931
Filing Date:
02/20/1931
Assignee:
Fetter, Harry H.
Primary Class:
Other Classes:
116/28R, 116/205, 116/DIG.41
International Classes:
E05B19/24
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