Foundation vent

Details Foundation vent Foundation vent

1990-03-19

1991-11-12

Gandy, James M.

Environmental heating and cooling; fluid handling and sanitary e

Heating or cooling

Element or attachment, not elsewhere specified

Patent

active

D03215571

REFERENCES:
patent: D259277 (1981-05-01), McDermott
patent: 1677421 (1928-07-01), Yager et al.
patent: 2309717 (1943-02-01), Siebenlist
patent: 3285155 (1966-11-01), Maltenfort
patent: 4026082 (1977-05-01), Crofoot
patent: 4498624 (1985-02-01), Kogut
patent: 4723533 (1988-02-01), Cover

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