Conditioned air vestibule

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

Patent

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Details

D23151, D25 48, D25 60, D2304

Patent

active

D02647516

REFERENCES:
patent: 3112686 (1963-12-01), Peterson
patent: 3115818 (1963-12-01), Smith
patent: 3218952 (1965-11-01), Gygax
patent: 3270655 (1966-09-01), Guirl et al.
patent: 3859900 (1975-01-01), Fordsmand
patent: 4074620 (1978-02-01), Jansson

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