Vent cap cover

Details Vent cap cover Vent cap cover

1990-11-27

1991-09-24

Gandy, James M.

Environmental heating and cooling; fluid handling and sanitary e

Heating or cooling

Air treatment

Patent

active

D03202674

REFERENCES:
patent: D259508 (1981-06-01), Giles
patent: 727019 (1903-05-01), Stewart
patent: 1606410 (1926-11-01), Frame
patent: 2172939 (1939-09-01), Lintern et al.
patent: 2294363 (1942-09-01), Brockway
patent: 2550353 (1951-04-01), Hopfinger
patent: 3085490 (1963-04-01), Field
patent: 3738621 (1973-06-01), Anderson
patent: 4026971 (1977-05-01), Glasae
patent: 4196657 (1980-04-01), Crongeyer
patent: 4759270 (1988-07-01), Lindeen
Photos Labeled A-E of a Vent Cap Cover, in public use prior to Dec. 1989.
J. C. Whitney's Cat. .COPYRGT.1979, p. 25, Roof Air Scoops 1, 2, and 3, top left and middle left Sides of page respectively.
1981 Sweet's Cat., vol. 11, Section 10.19/50, p. 3, Ampcor Roof Louvers RV-75, DV-75, RV-73, top right side of page. G33113

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