Backwater-trap
United States Patent 1354879

Inventors:
Harry, Boland
Publication Date:
10/05/1920
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Assignee:
Harry, Boland
Primary Class:
210/123
Other Classes:
137/584, 137/527, 137/448, 137/436, 137/389, 210/136, 210/446, 137/614.200, 137/519
International Classes:
F16K15/03; F16K15/02