Telephone

Details Telephone Telephone

1983-12-01

1986-06-10

Burke, Wallace R.

Recording, communication, or information retrieval equipment

Computer, data processor equipment

D14 53, D14 62, D14 60

Patent

active

D02841894

REFERENCES:
patent: D260643 (1981-09-01), Foggia et al.
patent: D265087 (1982-06-01), Yamaguchi et al.
patent: D269674 (1983-07-01), Hiroka et al.
patent: D271689 (1983-12-01), Genniers
patent: D275481 (1984-09-01), Foggia et al.
patent: D275751 (1984-10-01), Mahan
patent: D277663 (1985-02-01), Sakamoto et al.
patent: D277929 (1985-03-01), Sakamoto et al.
patent: D278903 (1985-05-01), Ando
patent: 4436963 (1984-03-01), Cottrell et al.
Toshiba 4 page brochure, published 9-1979: showing EKTS Keyphone System.
Panasonic Keyphone Sets; Newsweek Mag. 12-12-1983.

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