Backflow prevention valve

Details Backflow prevention valve Backflow prevention valve

1993-08-26

1994-05-31

Reid, Stella

Environmental heating and cooling; fluid handling and sanitary e

Fluid handling or treatment equipment

Valve or body therefor

Patent

active

D03474658

REFERENCES:
patent: D242709 (1976-12-01), Schourup
patent: 2685300 (1948-12-01), Hammon
patent: 3308798 (1967-03-01), Snider
patent: 3561472 (1971-02-01), Lamb
patent: 4870992 (1989-10-01), Irwin et al.

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