Damper unit

Details Damper unit Damper unit

1981-04-06

1983-11-29

Largen, James R.

Environmental heating and cooling; fluid handling and sanitary e

Heating or cooling

Element or attachment, not elsewhere specified

D2303

Patent

active

D02716151

REFERENCES:
patent: D268281 (1983-03-01), Prikkel
patent: 1337904 (1920-04-01), Hall
patent: 1659875 (1928-02-01), Jacobs
patent: 2959933 (1960-11-01), Burke
patent: 2975975 (1961-03-01), Weber
patent: 3273798 (1966-09-01), Kuiper
patent: 3366333 (1968-01-01), Diehl
patent: 3753548 (1973-08-01), Jung et al.
patent: 3804366 (1974-04-01), Rubright
patent: 4165833 (1979-08-01), Nagel
patent: 4290552 (1981-09-01), Prikkel
patent: 4361272 (1982-11-01), Prikkel et al.

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