Medical face mask

Details Medical face mask Medical face mask

1982-03-08

1985-02-05

Burke, Wallace R.

Equipment for safety, protection, and rescue

Fire extinguisher or casing therefor

Portable or hand held

Patent

active

D02775131

REFERENCES:
patent: D213077 (1968-12-01), Holloway
patent: D236033 (1975-07-01), Dryden
patent: D247982 (1978-05-01), Huddy
patent: D249368 (1978-09-01), Watkins, Jr.
patent: D250131 (1978-10-01), Lewis et al.
patent: D258994 (1981-04-01), Grane
patent: 3315674 (1967-04-01), Bloom et al.
patent: 3556097 (1971-01-01), Wallace

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