Exhaust fan housing

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

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Patent

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D02923122

REFERENCES:
patent: D257060 (1980-09-01), Mann
patent: D261803 (1981-11-01), Bohanon, Jr.
patent: D262886 (1982-02-01), Yoshimura
patent: D272846 (1984-02-01), McVicker et al.
patent: 2625872 (1953-01-01), Follausber et al.
patent: 2828682 (1958-04-01), Marker
patent: 3987713 (1976-10-01), Larkfeidt et al.
patent: 4266470 (1981-05-01), Schroder et al.

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