Unitary telephone ear receiver element and attached microphone

Details Unitary telephone ear receiver element and attached microphone Unitary telephone ear receiver element and attached microphone

1989-03-13

1990-07-17

Fay, Jr., Horace B.

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Element or attachment

Patent

active

D03093069

REFERENCES:
patent: D159223 (1950-07-01), Olson
patent: D211951 (1968-08-01), Thomson et al.
patent: D226273 (1973-01-01), Tyson et al.
patent: D262286 (1981-12-01), Austin et al.
patent: D287008 (1986-12-01), Tragatschnig
patent: D299643 (1989-01-01), Kubota
patent: 3280273 (1966-10-01), Flygstad et al.
patent: 4426657 (1983-12-01), Larkin
patent: 4634816 (1987-01-01), O'Malley et al.
patent: 4649570 (1987-03-01), Terback et al.
patent: 4720857 (1988-01-01), Burnis et al.
patent: 4741030 (1988-04-01), Wilson
patent: 4754434 (1988-06-01), Larkin et al.
patent: 4788724 (1988-12-01), Lazzenoni et al.
B. A. Pargh, Co. Inc.: 1989 Spring Summer Catalog: Headsets, Headphones, etc. on pp. 372-373.
Telephony, Jan. 26, 1987: p. 63: Plantronics Headset.
Stetomike HMT 808.TM.: Ad sheet: Headset.

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