Air filter element

Details Air filter element Air filter element

1993-10-04

1994-10-18

Lichtenstein, Lisa P.

Environmental heating and cooling; fluid handling and sanitary e

Heating or cooling

Air treatment

Patent

active

D03516504

REFERENCES:
patent: 4517940 (1985-05-01), Koyanagi et al.
patent: 5167209 (1992-12-01), Dufern et al.
Popular Mechanics, Apr. 1983, p. 4, Air Filter.

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