Underwater drainage apparatus
United States Patent 3363626

Inventors:
Bidwell, Robert E.
Hallstein, Edward J.
Sidney, Mishkin
Publication Date:
01/16/1968
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Assignee:
J A DEKNATEL INC
Primary Class:
604/151
Other Classes:
604/321, 137/176, 141/59, D24/117, 137/205
International Classes:
A61M1/00