Roofline ventilator

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

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98 4221

Patent

active

D02838397

REFERENCES:
patent: D203484 (1966-01-01), Rousey et al.
patent: 3079853 (1963-03-01), Smith
patent: 3311047 (1967-03-01), Smith et al.
patent: 3481263 (1969-12-01), Belden
patent: 4080083 (1978-03-01), Malott
patent: 4325290 (1982-04-01), Wolfert

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