Multi-cone earplug

Details Multi-cone earplug Multi-cone earplug

1994-06-16

1996-07-16

Zarfas, Louis S.

Medical and laboratory equipment

Prophylactic article

Ear plug or nose clip

Patent

active

D03718409

REFERENCES:
patent: D195322 (1963-05-01), Hill
patent: D234321 (1975-02-01), Visor
patent: D262491 (1981-12-01), Ebert
patent: D273614 (1984-04-01), Rolla
patent: D298356 (1988-11-01), Falco
patent: 4314553 (1982-02-01), Westerdal

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