Chimney cowl

Details Chimney cowl Chimney cowl

1990-04-04

1992-01-14

Gandy, James M.

Environmental heating and cooling; fluid handling and sanitary e

Heating or cooling

Air treatment

Patent

active

D03232115

REFERENCES:
patent: 28237 (1898-02-01), Woodside
patent: 399594 (1889-03-01), Wright
patent: 494454 (1893-03-01), Ashton
patent: 631139 (1899-08-01), Urban
patent: 1154044 (1915-09-01), Murray
patent: 2660105 (1953-11-01), Sabin, Jr.
patent: 2830525 (1958-04-01), Wilhite

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