Plate valve spring

Details Plate valve spring Plate valve spring

1990-01-04

1993-06-15

Largen, James R.

Environmental heating and cooling; fluid handling and sanitary e

Fluid handling or treatment equipment

Valve or body therefor

Patent

active

D03365093

REFERENCES:
patent: D217666 (1970-05-01), Self
patent: 2090486 (1937-08-01), Richardson
patent: 3123095 (1964-03-01), Kohler
patent: 3428082 (1969-02-01), Kohler
patent: 3875962 (1975-04-01), Bauer
patent: 4495964 (1985-01-01), Bennitt
patent: 4627464 (1986-12-01), Hartshorn
patent: 4854341 (1989-08-01), Bauer
patent: 4889156 (1989-12-01), Woollatt et al.
patent: 4913187 (1990-04-01), Wollatt et al.
patent: 5036880 (1991-08-01), Safford et al.

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