Butterfly valve

Details Butterfly valve Butterfly valve

1980-05-19

1982-05-18

Largen, James R.

Environmental heating and cooling; fluid handling and sanitary e

Heating or cooling

Element or attachment, not elsewhere specified

D2301

Patent

active

D02644932

REFERENCES:
patent: D253365 (1979-11-01), Nyberg
patent: 3091428 (1963-05-01), Magos
patent: 3129920 (1964-04-01), Stillwagon
patent: 3173650 (1965-03-01), Cotterman et al.
patent: 3206164 (1965-09-01), Yopp
patent: 3241808 (1966-03-01), Allen
patent: 3254873 (1966-06-01), Knox
patent: 3329359 (1967-07-01), Allen
patent: 3338551 (1967-08-01), Block
patent: 3958595 (1976-05-01), Rene

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