Portable air filtration unit

Details Portable air filtration unit Portable air filtration unit

1981-03-16

1983-11-08

Largen, James R.

Equipment for safety, protection, and rescue

Fire extinguisher or casing therefor

Portable or hand held

D23149, D29 7, D2999, D2304

Patent

active

D02713381

REFERENCES:
patent: D143097 (1945-12-01), Schneider
patent: D180098 (1957-04-01), Mueller
patent: D222687 (1971-11-01), Adams
patent: D231571 (1974-04-01), Parker
patent: D238979 (1976-02-01), Perry et al.
patent: 1196539 (1916-08-01), Goldberg
patent: 1298404 (1919-03-01), Romanoff
patent: 3861894 (1975-01-01), Marsh

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