Ear muff

Details Ear muff Ear muff

1988-12-02

1990-10-02

Word, A. Hugo

Equipment for safety, protection, and rescue

Fire extinguisher or casing therefor

Portable or hand held

Patent

active

D03110745

REFERENCES:
patent: D215138 (1969-09-01), Mackey
patent: 243168 (1881-06-01), Spitz
patent: D254876 (1980-05-01), Reitenga et al.
patent: 1066511 (1913-07-01), Markoff
patent: 1651650 (1927-12-01), Walsh

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