Telephone unit

Recording – communication – or information retrieval equipment – Computer – data processor equipment

Patent

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Details

D14 53, D14 63, D14 62

Patent

active

D02814226

REFERENCES:
patent: D257772 (1981-01-01), Fukutani
patent: D265401 (1982-07-01), Genaro et al.
patent: D267873 (1983-02-01), Brown et al.
patent: D269089 (1983-05-01), Foggia et al.
patent: D269178 (1983-05-01), Foggia et al.
patent: D269674 (1983-07-01), Hirota et al.
patent: D271689 (1983-12-01), Gerniers
patent: D272622 (1984-02-01), Foggia et al.
patent: D275751 (1984-10-01), Mahan
Telephony Mag. Showing of "Talkback" Phone, p. 16, issue of 9-28-81.

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