Title:
Swimming pool cleaner and filter
United States Patent 3078998

Inventors:
Blumenfeld, Charles M.
Publication Date:
02/26/1963
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Assignee:
Blumenfeld, Charles M.
Primary Class:
210/94
Other Classes:
210/251, 210/167.120, 210/407, 134/176, 15/246.500, 15/1.700
International Classes:
E04H4/16; E04H4/00
US Patent References:
3012676Liquid purifier