Valve core

Details Valve core Valve core

1977-05-18

1979-08-21

Largen, James R.

Environmental heating and cooling; fluid handling and sanitary e

Heating or cooling

Element or attachment, not elsewhere specified

137223, D2301

Patent

active

D02527014

REFERENCES:
patent: D139830 (1944-12-01), Pool
patent: D202701 (1965-11-01), Davis, Jr.
patent: D218518 (1970-08-01), Oden
patent: D219778 (1971-01-01), Leeming
patent: 670725 (1901-03-01), Pickett
patent: 3438397 (1969-04-01), Gilpin
patent: 3495594 (1970-02-01), Swanson
patent: 3797317 (1974-03-01), Peterson, Jr.
patent: 3902517 (1975-09-01), Hastwell

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