Hearing aid

Details Hearing aid Hearing aid

1983-11-10

1987-01-13

Word, A. Hugo

Medical and laboratory equipment

Equipment for diagnosis, analysis, or treatment

Orthopedic or chiropractic

Patent

active

D02877643

REFERENCES:
patent: 2595672 (1952-05-01), Greenwood
patent: 2754365 (1956-07-01), Walters
patent: 2971065 (1961-02-01), Busse
patent: 4069400 (1978-01-01), Johanson et al.

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