Title:
Roof drain
United States Patent 3357561
US Patent References:
/1067491.html
- - 1067491

/1080052.html
- - 1080052

/1138700.html
- - 1138700

/1180018.html
- - 1180018

Drainage device
- - 1973321


Inventors:
Schmid, John H.
Anderson, Norman J.
Publication Date:
12/12/1967
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Assignee:
ZURN IND INC
Primary Class:
210/163
Other Classes:
73/215, 210/137, 52/12
International Classes:
E04D13/04
US Patent References:
2283160Roof drain
2572208Water runoff control construction
2666493Three-way, all-purpose drain