Combined drywell cover and drain insert

Details Combined drywell cover and drain insert Combined drywell cover and drain insert

1992-06-16

1994-09-20

Reid, Stella

Environmental heating and cooling; fluid handling and sanitary e

Fluid handling or treatment equipment

Fitting

Patent

active

D03508161

REFERENCES:
patent: 317153 (1885-05-01), Lowrie
patent: 1469321 (1923-10-01), Kramer
patent: 4224770 (1980-09-01), Petty
patent: 4861186 (1989-08-01), Ferns
patent: 4890425 (1990-01-01), Mamula

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