Curb protector for roof drains

Details Curb protector for roof drains Curb protector for roof drains

1999-12-29

2000-07-11

Douglas, Alan P.

Environmental heating and cooling; fluid handling and sanitary e

Fluid handling or treatment equipment

Fitting

2301

Patent

active

D04281217

REFERENCES:
patent: 714185 (1902-11-01), Jackson et al.
patent: 1978491 (1934-10-01), Gladman
patent: 4549833 (1985-10-01), Ferns
patent: 4637585 (1987-01-01), Picollo

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