Filter mask

Details Filter mask Filter mask

1990-09-17

1992-05-26

Chin, Kay H.

Equipment for safety, protection, and rescue

Fire extinguisher or casing therefor

Portable or hand held

D29 8

Patent

active

D03265404

REFERENCES:
patent: D286213 (1986-10-01), Maryyanek e al.
patent: 2640481 (1953-06-01), Conley
patent: 2664887 (1954-01-01), Green
patent: 4686976 (1987-08-01), Bakkila et al.

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