Air admittance valve

Details Air admittance valve Air admittance valve

1999-05-25

2000-06-27

Taylor, Robin V.

Environmental heating and cooling; fluid handling and sanitary e

Fluid handling or treatment equipment

Valve or body therefor

2301

Patent

active

D04272862

REFERENCES:
patent: D299950 (1989-02-01), Canaan et al.
patent: D321748 (1991-11-01), Brito
patent: 1996291 (1935-04-01), Haas
patent: 2371449 (1945-03-01), Langdon
patent: 3923081 (1975-12-01), Persson
patent: 4436107 (1984-03-01), Persson
patent: 4535807 (1985-08-01), Ericson
patent: 4556084 (1985-12-01), Frawley
patent: 4867802 (1989-09-01), Earl
patent: 5048562 (1991-09-01), Frawley
patent: 5273068 (1993-12-01), Duren

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