Drain fitting operating knob

Details Drain fitting operating knob Drain fitting operating knob

1998-07-31

1999-04-20

Zarfas, Louis S.

Environmental heating and cooling; fluid handling and sanitary e

Fluid handling or treatment equipment

Fitting

2301

Patent

active

D04085060

REFERENCES:
patent: 4320540 (1982-03-01), Leavens
patent: 4339832 (1982-07-01), Cuscherd
patent: 4520942 (1985-06-01), Dwinell
patent: 4720877 (1988-01-01), Watts
patent: 5749105 (1998-05-01), Bruno et al.
patent: 5784725 (1998-07-01), Joiner

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