Water-closet ventilator
United States Patent 1685891

Inventors:
Watkins, William M.
Finley, George C.
Publication Date:
10/02/1928
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Assignee:
Watkins, William M.
Finley, George C.
Primary Class:
4/351
International Classes:
E03D9/05; E03D9/052; E03D9/04