Title:
Self-cleaning drain head
United States Patent 2263259

Inventors:
Boosey, Edward W. N.
Publication Date:
11/18/1941
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Assignee:
Boosey, Edward W. N.
Primary Class:
210/314
Other Classes:
210/164, 137/247.350, 210/448
International Classes:
E03C1/282; E03C1/28