Touchpad dialer for mobile telephones

Details Touchpad dialer for mobile telephones Touchpad dialer for mobile telephones

1976-06-01

1977-11-22

Claffy, Kathleen H.

325 55, 325 64, H04Q 704

Patent

active

040597288

ABSTRACT:
A touchpad dialer for mobile telephones comprising a touchpad keyboard, a dial pulse relay, a means for converting signals from the keyboard to control signals for the dial pulse relay, a tone start, and a means for actuating the tone start relay before the dial pulse relay is actuated for a predetermined time after the control signals to the dial pulse relay cease. Both the dial pulse relay and the tone start relay are electrically coupled to the control head of a mobile telephone.

REFERENCES:
patent: 3193623 (1965-07-01), Burns et al.
patent: 3644681 (1972-02-01), Rice
patent: 3856982 (1974-12-01), Lawson et al.
patent: 3860765 (1975-01-01), McCabe et al.
patent: 3920926 (1975-11-01), Lenaerts et al.
patent: 3982079 (1976-09-01), Hoehn et al.

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