Butterfly valve

Details Butterfly valve Butterfly valve

1977-05-18

1979-03-20

Largen, James R.

Environmental heating and cooling; fluid handling and sanitary e

Heating or cooling

Element or attachment, not elsewhere specified

D2301

Patent

active

D02513838

REFERENCES:
patent: D198885 (1964-08-01), Gifford
patent: D198886 (1964-08-01), Gifford
patent: 2122560 (1938-07-01), DeFlorez
patent: 3485476 (1969-12-01), Hemphill
patent: 4007910 (1977-02-01), Yasuoka et al.

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