Scented filter

Details Scented filter Scented filter

1993-03-25

1994-02-22

Burke, Wallace R.

Environmental heating and cooling; fluid handling and sanitary e

Heating or cooling

Air treatment

D11 67, D23367

Patent

active

D03445828

REFERENCES:
patent: D36299 (1903-04-01), Greenman
patent: D255203 (1980-06-01), Rothstein
patent: D281047 (1985-10-01), Colquitt
patent: 3905787 (1975-09-01), Roth
patent: 4227904 (1980-10-01), Kasmark
patent: 4563333 (1986-01-01), Frigon

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