Title:
Ported shoe guide
United States Patent 1873741


Inventors:
Crowell, Alvin B.
Application Number:
US17368227A
Publication Date:
08/23/1932
Filing Date:
03/08/1927
Assignee:
Crowell, Alvin B.
Primary Class:
Other Classes:
166/222, 166/326, 166/327
International Classes:
E21B17/14
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