Ear protector

Details Ear protector Ear protector

1989-03-01

1992-01-07

Word, A. Hugo

Equipment for safety, protection, and rescue

Fire extinguisher or casing therefor

Portable or hand held

Patent

active

D03230430

REFERENCES:
patent: D194152 (1962-11-01), Noyes et al.
patent: D222547 (1971-11-01), Kantor
patent: D313092 (1990-12-01), Nilsson
patent: 1628483 (1927-05-01), Wiegand et al.
patent: 3505684 (1970-04-01), Hutchinson et al.

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