Hearing protective earplug

Details Hearing protective earplug Hearing protective earplug

1994-04-15

1996-11-12

Zarfas, Louis S.

Medical and laboratory equipment

Prophylactic article

Ear plug or nose clip

Patent

active

D03755517

REFERENCES:
patent: D245202 (1977-07-01), Asher
patent: D298356 (1988-11-01), Falco
patent: D303014 (1989-08-01), Gardner et al.
patent: 3259128 (1966-07-01), Leight
patent: 4122841 (1978-10-01), Rock et al.
patent: 5188123 (1993-02-01), Gardner
Bilsom Perfit earplug, Lab Safety Catalog, (1993).

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