Patents Assigned to American Communication Systems
  • Touchpad dialer for mobile telephones
    Patent number: 4059728
    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.
    Type: Grant
    Filed: June 1, 1976
    Date of Patent: November 22, 1977
    Assignee: American Communication Systems
    Inventor: C. Paul Milkes