Ventilator

Details Ventilator Ventilator

1975-06-11

1977-03-29

Burke, Wallace R.

Environmental heating and cooling; fluid handling and sanitary e

Heating or cooling

Element or attachment, not elsewhere specified

D2304

Patent

active

D02438518

REFERENCES:
patent: D192894 (1962-05-01), Patterson et al.
patent: D196462 (1963-10-01), Jenn et al.
patent: D203139 (1965-12-01), Jenn
patent: 1053633 (1913-02-01), Mundy
Sears, Spring through Summer Catalog, 1974, Eastern Edition 248K, p. 833, Roof Type Ventilator, Model 42K6413C.
Sweet's Architectural Catalog File, vol. 12, 1973, Section 15.9/But, p. 2.

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