Casing for a fan or heater

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

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D23336, D23366

Patent

active

D03102629

REFERENCES:
patent: D133665 (1942-09-01), Fukal
patent: D152516 (1949-02-01), Brown
patent: D155801 (1949-11-01), Grover
patent: D160709 (1950-10-01), Jones et al.
patent: D160948 (1950-11-01), Kisling
patent: D205974 (1966-10-01), Lawlor
patent: 2474594 (1949-06-01), Rausch et al.
patent: 2582532 (1952-01-01), Dean
patent: 2628018 (1953-02-01), Koch
patent: 2642220 (1953-06-01), Koch
1984 Sweet's Catalogue, vol. 9, Section 16.6 h/Ce, p. 1, Centrecon Concrete Poles 1, left bottom side of page.

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