Nose filter

Details Nose filter Nose filter

1991-08-14

1993-05-25

Burke, Wallace R.

Environmental heating and cooling; fluid handling and sanitary e

Heating or cooling

Air treatment

Patent

active

D03359212

REFERENCES:
patent: 3145711 (1964-08-01), Beber
patent: 3722509 (1973-03-01), Nebel
patent: 4030491 (1977-06-01), Mattila
patent: 4052983 (1977-10-01), Bovender
patent: 4267831 (1981-05-01), Aquilar
Symbol Sourcebook, .COPYRGT.1972, p. 120, Heavy Rain, Continuous, Symbol, upper right side of page.

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