Room air ionizer

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

D02725584

REFERENCES:
patent: D192560 (1962-04-01), Rinaldi
patent: D218686 (1970-09-01), Saito
patent: D244856 (1977-06-01), Haufe et al.
patent: D255486 (1980-06-01), Bender
patent: D266505 (1982-10-01), Rakocy
patent: D269292 (1983-06-01), McGraw
patent: 2218198 (1940-10-01), Harris
patent: 3861894 (1975-01-01), Marsh
patent: 4253852 (1981-03-01), Adams
patent: 4261712 (1981-04-01), Kinkado
patent: 4361427 (1982-11-01), Barradas

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