Listening aid

Details Listening aid Listening aid

1991-07-22

1993-11-30

Word, A. Hugo

Medical and laboratory equipment

Equipment for diagnosis, analysis, or treatment

Auricular

Patent

active

D03418855

REFERENCES:
patent: D221045 (1971-07-01), McCabe et al.
patent: D266945 (1982-11-01), Greenberg
patent: 1820107 (1931-08-01), Agee
patent: 2469254 (1949-05-01), Bankson
patent: 3618698 (1971-11-01), McCabe et al.
patent: 3938616 (1976-02-01), Brownfield
patent: 4556122 (1985-12-01), Goode
patent: 4771859 (1988-09-01), Breland
patent: 5020629 (1991-06-01), Edmundson et al.

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