Self-closing ventilation louver

Details Self-closing ventilation louver Self-closing ventilation louver

1983-01-06

1985-10-29

Largen, James R.

Environmental heating and cooling; fluid handling and sanitary e

Heating or cooling

Element or attachment, not elsewhere specified

D23114

Patent

active

D02811944

REFERENCES:
patent: D225010 (1972-10-01), Steiner
patent: D225011 (1972-10-01), Steiner
patent: D242462 (1976-11-01), Shames et al.
patent: D256389 (1980-08-01), Caine
patent: 2825275 (1958-03-01), Gerlitz
patent: 3143953 (1964-08-01), Bristol
patent: 3263906 (1966-08-01), Ward
patent: 3270656 (1966-09-01), Cook
patent: 3334569 (1967-08-01), Lambie
patent: 4094336 (1978-06-01), Urschel et al.
patent: 4131060 (1978-12-01), Caine
patent: 4151789 (1979-05-01), Grobard
patent: 4385550 (1983-05-01), Steiner et al.
patent: 4406216 (1983-09-01), Hott et al.

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