Drain control knob

Details Drain control knob Drain control knob

1988-01-14

1991-06-18

Largen, James R.

Environmental heating and cooling; fluid handling and sanitary e

Fluid handling or treatment equipment

Valve or body therefor

Patent

active

D03176460

REFERENCES:
patent: D213623 (1969-03-01), Austin
patent: D217965 (1970-07-01), Korol
patent: D235341 (1975-06-01), Korol
patent: D239624 (1976-04-01), Korol
patent: D275986 (1984-10-01), Stairs, Jr.
patent: D287270 (1986-12-01), Yost
patent: D287500 (1986-07-01), Bolget et al.
patent: D296353 (1988-06-01), Reid
patent: D296578 (1988-07-01), Reid
patent: D297356 (1988-08-01), Reid
patent: D384971 (1989-12-01), Yost

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