Key telephone set

Details Key telephone set Key telephone set

1983-01-26

1986-08-26

Burke, Wallace R.

Recording, communication, or information retrieval equipment

Computer, data processor equipment

D14 53, D14 63

Patent

active

D02853043

REFERENCES:
patent: D229837 (1974-01-01), Genaro et al.
patent: D260643 (1981-09-01), Foggia et al.
patent: D265734 (1982-08-01), Mahan
patent: D269674 (1983-07-01), Hirota et al.
patent: D271689 (1983-12-01), Gerniers
patent: D273381 (1984-04-01), Abe et al.
patent: D275751 (1984-10-01), Mahan
patent: D277663 (1985-02-01), Sakamoto et al.

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