Attic ventilator

Details Attic ventilator Attic ventilator

1976-05-10

1978-08-29

Largen, James R.

Environmental heating and cooling; fluid handling and sanitary e

Heating or cooling

Element or attachment, not elsewhere specified

D2304

Patent

active

D02491583

REFERENCES:
patent: D102083 (1936-11-01), Hueglin
patent: D129935 (1941-10-01), Wilcoxson
patent: D147336 (1947-08-01), Koch
patent: D164139 (1951-07-01), SeBastian
patent: D211576 (1968-07-01), Jenn et al.
patent: 2573145 (1951-10-01), Sprouse et al.
patent: 2735611 (1956-02-01), McLean

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