Evaporative cooler

Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified

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Details

D23153, D2304

Patent

active

D02717123

REFERENCES:
patent: D213695 (1969-04-01), Soroos
patent: D227986 (1973-07-01), Schaffer
patent: D244294 (1977-05-01), Glasoe
patent: D258757 (1981-03-01), Jordan
patent: D259206 (1981-05-01), Parren
patent: 1542740 (1925-06-01), Spillman
patent: 4026971 (1977-05-01), Glasoe
patent: 4043777 (1977-08-01), Parren
patent: 4094935 (1978-06-01), Walker et al.

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