Breathing gas mask

Details Breathing gas mask Breathing gas mask

1981-07-06

1983-10-25

Burke, Wallace R.

Equipment for safety, protection, and rescue

Fire extinguisher or casing therefor

Portable or hand held

D29 7, D2902

Patent

active

D02711443

REFERENCES:
patent: D137197 (1944-02-01), DuBois
patent: D193048 (1962-06-01), Schwartz
patent: D220304 (1971-03-01), Wolfe
patent: D249368 (1978-09-01), Watkins, Jr.
patent: 2835250 (1958-05-01), Austin
patent: 2898908 (1959-08-01), Sovinsky
patent: 3259127 (1966-07-01), Klinger et al.
patent: 3343535 (1967-09-01), Lytle et al.
patent: 3550588 (1970-12-01), Stahl
patent: 3968793 (1976-07-01), Geissler

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