Air vent

Details Air vent Air vent

1982-09-02

1985-07-09

Kemper, Catherine E.

Environmental heating and cooling; fluid handling and sanitary e

Heating or cooling

Element or attachment, not elsewhere specified

Patent

active

D02796015

REFERENCES:
patent: 1652330 (1927-12-01), Schwartzberg
patent: 4274330 (1981-06-01), Witten et al.
Heating and Air Conditioning Contractor, Oct. 1973, p. 30, Registers "A" & B.

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