Title:
ROOF DRAIN
United States Patent 3529723

Inventors:
Hagedorn, Charles L.
Publication Date:
09/22/1970
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Assignee:
Charles, Hagedorn L.
WADE INTERN LTD
Primary Class:
210/163
International Classes:
E04D13/04; E03F5/14
US Patent References:
2740490Roof drain
2832564Gate valve
3349917Strainer assembly for floor drains




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