Fan blade

Details Fan blade Fan blade

1978-04-03

1980-02-19

Largen, James R.

Environmental heating and cooling; fluid handling and sanitary e

Heating or cooling

Element or attachment, not elsewhere specified

D2304

Patent

active

D02542676

REFERENCES:
patent: D22164 (1893-01-01), Thrush
patent: D117860 (1939-11-01), Upson
patent: D121366 (1940-07-01), Cohn
patent: D131699 (1942-03-01), Funk
patent: D158611 (1950-05-01), Philippe
patent: D236147 (1975-07-01), Molenaar
patent: 1217742 (1917-02-01), Francisco
patent: 2021707 (1935-11-01), Upson

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