Telephone headset hearing aid

Details Telephone headset hearing aid Telephone headset hearing aid

1984-07-31

1987-04-14

Burke, Wallace R.

Recording, communication, or information retrieval equipment

Computer, data processor equipment

D14 59, D14 36

Patent

active

D02892898

REFERENCES:
patent: 2991333 (1961-07-01), Rose
patent: 3192326 (1965-06-01), Chapman
patent: 3919501 (1975-11-01), Cech et al.
patent: 4389542 (1983-06-01), Gorike
patent: 4409442 (1983-10-01), Kamimura
patent: 4455457 (1984-06-01), Akira
patent: 4484029 (1984-11-01), Kenney
patent: 4529058 (1985-07-01), Emery
patent: 4538034 (1985-08-01), French
patent: 4546215 (1985-10-01), Ferraro
patent: 4551584 (1985-11-01), Mathiasen

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