Dust filtering respirator

Details Dust filtering respirator Dust filtering respirator

1981-06-24

1983-11-15

Burke, Wallace R.

Equipment for safety, protection, and rescue

Fire extinguisher or casing therefor

Portable or hand held

D2902

Patent

active

D02714329

REFERENCES:
patent: 2227667 (1941-01-01), Panethene
patent: 2382364 (1945-08-01), Taut
patent: 2964038 (1960-12-01), Silverman
patent: 3220409 (1965-11-01), Liloia et al.
patent: 3490447 (1970-01-01), Jackson

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