Multi winged earplug

Details Multi winged earplug Multi winged earplug

1992-01-13

1993-11-23

Word, A. Hugo

Medical and laboratory equipment

Prophylactic article

Ear plug or nose clip

Patent

active

D03416569

REFERENCES:
patent: D97038 (1935-10-01), Cohn
patent: D329897 (1992-09-01), Leight
patent: 4053051 (1977-10-01), Brinkholl
patent: 4338929 (1982-07-01), Lundin et al.
patent: 4608217 (1986-08-01), Csiki
patent: 5044463 (1991-09-01), Car

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