Electronic air cleaner

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

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D2304

Patent

active

D02704676

REFERENCES:
patent: D181683 (1957-12-01), Steiner
patent: D201932 (1965-08-01), Talge et al.
patent: D215719 (1969-10-01), Julkenbeck
patent: D258759 (1981-03-01), Johnson
patent: 3745750 (1973-07-01), Arff
patent: 3928008 (1975-12-01), Peterson
patent: 4252547 (1961-02-01), Johnson
patent: 4253852 (1981-03-01), Adams
patent: 4361427 (1982-11-01), Barradas
Home Furnishings Daily, Jul. 16, 1960, p. 29, "Lectrofitter" item.

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