Butterfly valve

Details Butterfly valve Butterfly valve

1998-02-03

1999-05-18

Douglas, Alan P.

Environmental heating and cooling; fluid handling and sanitary e

Fluid handling or treatment equipment

Valve or body therefor

2301

Patent

active

D04100700

REFERENCES:
patent: D25720 (1896-06-01), Lunken
patent: D190350 (1961-05-01), Anderson et al.
patent: D251255 (1979-03-01), Hansen et al.
patent: D291723 (1987-09-01), Kemp
patent: D292933 (1987-11-01), Kemp

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