Title:
Cellar drain valve
United States Patent 2235308
Inventors:
Banker, Olin E.
Publication Date:
03/18/1941
Export Citation:
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Assignee:
Banker, Olin E.
Primary Class:
251/78
Other Classes:
138/89, 251/87, 251/89
International Classes:
F16K31/56; F16K31/44
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