Respirator

Equipment for safety – protection – and rescue – Fire extinguisher or casing therefor – Portable or hand held

Patent

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Details

D2902

Patent

active

D02709570

REFERENCES:
patent: D57528 (1921-04-01), Knoblock
patent: 2106795 (1938-02-01), Cover
patent: 2578007 (1951-12-01), Hill
patent: 2845927 (1958-08-01), Hill
patent: 3249108 (1966-05-01), Terman
patent: 3521630 (1970-07-01), Westberg
patent: 4004584 (1977-01-01), Geaney

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