Roof stack vent

Details Roof stack vent Roof stack vent

1979-02-08

1980-10-07

Largen, James R.

Environmental heating and cooling; fluid handling and sanitary e

Heating or cooling

Element or attachment, not elsewhere specified

D2304

Patent

active

D02572826

REFERENCES:
patent: D223712 (1972-05-01), Mason
patent: 2277982 (1942-03-01), Hosbein
patent: 2741972 (1956-04-01), Pryne
patent: 3345932 (1967-10-01), Saver
patent: 3685426 (1972-08-01), Rosa

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