Retrofit louver for evaporative air coolers

Details Retrofit louver for evaporative air coolers Retrofit louver for evaporative air coolers

1992-06-11

1993-08-31

Burke, Wallace R.

Environmental heating and cooling; fluid handling and sanitary e

Heating or cooling

Element or attachment, not elsewhere specified

D25 47

Patent

active

D03389545

REFERENCES:
patent: D181519 (1957-11-01), Devereux
patent: 4142340 (1979-03-01), Howard
Grainger's Spring '86 cat., p. 1096, Evaporative Cooler, bottom of page.
American Air Filters Brochure, published prior to 1990, p. 4, Weather Louver A, bottom right side of page.
House & Home, March, 1968, p. 43, Ventilator A, middle of page.

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