Air filter

Details Air filter Air filter

1976-09-10

1979-08-14

Largen, James R.

Environmental heating and cooling; fluid handling and sanitary e

Heating or cooling

Element or attachment, not elsewhere specified

D15 54, D2304

Patent

active

D02526409

REFERENCES:
patent: D151464 (1948-10-01), Olsen
patent: D174841 (1955-05-01), Trombley
patent: D178322 (1956-07-01), Kasper
patent: D187065 (1966-01-01), Chapman
patent: D235547 (1975-06-01), Schimanski
patent: 2810451 (1957-10-01), Crisp
patent: 3290865 (1966-12-01), Serou et al.
patent: 3481116 (1969-12-01), Ferri

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