Check valve casing

Details Check valve casing Check valve casing

1978-06-05

1981-08-18

Largen, James R.

Environmental heating and cooling; fluid handling and sanitary e

Heating or cooling

Element or attachment, not elsewhere specified

D2301

Patent

active

D02602806

REFERENCES:
patent: D242709 (1976-12-01), Schourup
patent: D242710 (1976-12-01), Schourup
patent: 274787 (1883-03-01), Kilborn
patent: 1360960 (1920-11-01), Kudla
patent: 2296135 (1942-09-01), Batson et al.
patent: 2945508 (1960-07-01), Schweisthal
patent: 3189040 (1965-06-01), Johnson
patent: 3503418 (1970-03-01), Petrucci et al.
patent: 4168723 (1979-09-01), Schneider

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