Anti-clogging device for roof drains
United States Patent 2807368
US Patent References:
/1011669.html
- - 1011669

Anticlogging device for roof drains
- - 2485547


Inventors:
Blau, James B.
Publication Date:
09/24/1957
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Assignee:
Margaret, Czibere
Primary Class:
210/463
Other Classes:
52/12, 210/472
International Classes:
E04D13/04