Construction of sewers and sewer basins and receptacles for use in sewer basins
United States Patent 2102310

Inventors:
Egan, George F.
Publication Date:
12/14/1937
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Assignee:
Egan, George F.
Primary Class:
210/497.300
Other Classes:
210/314, 210/153, 210/237, 210/247
International Classes:
E03F5/04