Air control check unit for fireplaces and the like

Details Air control check unit for fireplaces and the like Air control check unit for fireplaces and the like

1981-05-08

1983-12-13

Largen, James R.

Environmental heating and cooling; fluid handling and sanitary e

Heating or cooling

Element or attachment, not elsewhere specified

D2303

Patent

active

D02717930

REFERENCES:
patent: 161724 (1875-04-01), Winfield
patent: D257593 (1980-12-01), Vogel
patent: 260199 (1882-06-01), Howard
patent: D262310 (1981-12-01), Funk
patent: 2740398 (1956-04-01), Collins
patent: 2863443 (1958-12-01), Hoffman
patent: 4019492 (1977-04-01), Rush
patent: 4060196 (1977-11-01), Goldsby et al.
patent: 4106475 (1978-08-01), Muyes
patent: 4185611 (1980-01-01), Johnson
patent: 4372288 (1919-02-01), Nieholas

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