Face mask

Details Face mask Face mask

1989-03-07

1991-12-17

Word, A. Hugo

Equipment for safety, protection, and rescue

Fire extinguisher or casing therefor

Portable or hand held

D 2500

Patent

active

D03224929

REFERENCES:
patent: D10847 (1878-10-01), Ackerman
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patent: 1327062 (1920-01-01), Quinn
patent: 2183998 (1938-03-01), Thorman
patent: 2265529 (1939-05-01), Kemp
patent: 2270521 (1942-01-01), Gray
patent: 2883670 (1959-04-01), Pratt
patent: 3080566 (1963-03-01), Neumann
patent: 3105970 (1963-10-01), Herzberg
patent: 3265076 (1962-11-01), Ellis
patent: 4468818 (1984-09-01), Flannery

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