Rotatable chimney cowl

Details Rotatable chimney cowl Rotatable chimney cowl

1983-02-18

1985-11-05

Largen, James R.

Environmental heating and cooling; fluid handling and sanitary e

Heating or cooling

Element or attachment, not elsewhere specified

Patent

active

D02812754

REFERENCES:
patent: D111547 (1938-09-01), McDerment
patent: D136467 (1943-10-01), Murray
patent: D242355 (1976-11-01), Kumada
patent: D267667 (1983-01-01), Flynn
patent: 474689 (1892-05-01), Powers et al.
patent: 488074 (1892-12-01), Iwan
patent: 870976 (1907-11-01), Ludwig
patent: 1407179 (1922-02-01), Tidwell
patent: 1483130 (1924-02-01), Sylvan
patent: 1831189 (1931-11-01), Obermark
patent: 2188709 (1940-06-01), Friedman
patent: 2223003 (1940-11-01), Friedman

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