Filtration unit for exhaust air from a clean room helmet worn fo

Details Filtration unit for exhaust air from a clean room helmet worn fo Filtration unit for exhaust air from a clean room helmet worn fo

1986-08-22

1988-11-08

Burke, Wallace R.

Equipment for safety, protection, and rescue

Fire extinguisher or casing therefor

Portable or hand held

D23365

Patent

active

D02984733

REFERENCES:
patent: D238576 (1976-01-01), Vidal
patent: D295046 (1988-04-01), Odell
patent: 3506667 (1985-03-01), Ausite
patent: 4548626 (1985-10-01), Ackley et al.
patent: 4614186 (1986-09-01), John
patent: 4676236 (1987-06-01), Piorkowski et ala.

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