Vent cap cover

Details Vent cap cover Vent cap cover

1991-02-25

1992-10-20

Burke, Wallace R.

Environmental heating and cooling; fluid handling and sanitary e

Heating or cooling

Air treatment

Patent

active

D03304159

REFERENCES:
patent: D103336 (1937-02-01), Peo
patent: D103337 (1937-02-01), Peo
patent: D216795 (1970-03-01), Field
patent: D320897 (1991-10-01), Lanigan
patent: 2550353 (1951-04-01), Hopfinger
patent: 2636429 (1953-04-01), Parsons
patent: 3060834 (1962-10-01), Cira
patent: 4196657 (1980-04-01), Crongeyer et al.
patent: 4759270 (1988-07-01), Lindeen
Air Conditioning, Heating, Ventilation, Apr. 1968, p. 97, Power Roof Ventilator A, top right side of page.
Photos labeled Exhibits A-E, submitted by applicant in his Information Disclosure Statement, the vent cap cover in these photos was made prior to Feb. 25 1991.

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