Air ameliorant or similar article

Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Air treatment

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D03189120

REFERENCES:
patent: D292311 (1987-10-01), Joyaux et al.
patent: D307938 (1990-05-01), Fish
patent: 4157787 (1979-06-01), Schwartz
patent: 4473382 (1984-09-01), Cheslock
patent: 4917301 (1990-04-01), Munteanu
Sears Spring/Summer Catalogue (1980), p. 1200, Hassock Fan , middle top side of page.

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