Drain construction

Details Drain construction Drain construction

1999-02-26

2000-02-22

Douglas, Alan P.

Environmental heating and cooling; fluid handling and sanitary e

Fluid handling or treatment equipment

Fitting

2301

Patent

active

D04211014

REFERENCES:
patent: 2117887 (1938-05-01), Holland
patent: 2121613 (1938-06-01), Schultz
patent: 3343774 (1967-09-01), Pryor

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