Telephone amplifier

Details Telephone amplifier Telephone amplifier

1984-07-16

1986-11-11

Burke, Wallace R.

Recording, communication, or information retrieval equipment

Computer, data processor equipment

D14 60, D14 92, D14 52, D14 59

Patent

active

D02866358

REFERENCES:
patent: D243536 (1977-03-01), van de Poel
patent: D244209 (1977-05-01), Bliven
patent: D247174 (1978-02-01), Vanda
patent: D261761 (1981-11-01), Ingber et al.
patent: D261764 (1981-11-01), Klucznik
patent: D275752 (1984-10-01), Mahan
patent: D275753 (1984-10-01), Mahan
patent: D280463 (1985-09-01), Mitchell
patent: D282166 (1986-01-01), Yuen
patent: D282179 (1986-01-01), Yuen
patent: 3469336 (1969-09-01), Halperin
Post Office Electrical Eng. Journal (Gr. Britain, Vol. 74, Oct. 1981: Article re Customer Apparatus: Fig. 3, at p. 239-"Doric" Loud Speaker.

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