Air purifying apparatus

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

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D02856034

REFERENCES:
patent: D258686 (1981-03-01), Johnson
patent: D269292 (1983-06-01), McGaw
patent: D280129 (1985-08-01), Doyle
patent: 2585106 (1952-02-01), Frank
Modern Plastics (Mar. 1960), p. 85, #1-Northern Electric Vaporizer.

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