Patents Assigned to Southwestern Bell Telecommunications, Inc.
  • Cordless telephone system
    Patent number: 4706274
    Abstract: A cordless telephone system includes a control unit having a speaker, a microphone and control circuitry for selective operation in a "normal" mode for communications between the handset and an outside party, a "local answer" mode for communications between a party at the control unit and an outside party, an "intercom" mode for communications between parties at the control unit and the handset and a "3-way" mode for communications between parties at the control unit and handset and an outside party. A microprocessor so responds to ring detect, control and switch-generated interrupt signals as to obtain the desired communications.
    Type: Grant
    Filed: May 11, 1984
    Date of Patent: November 10, 1987
    Assignee: Southwestern Bell Telecommunications, Inc.
    Inventors: William Baker, Michael K. Pedigo, Noel Atkinson, Henry P. Shelton
  • Combination handset and stand telephone
    Patent number: D294825
    Type: Grant
    Filed: October 10, 1986
    Date of Patent: March 22, 1988
    Assignee: Southwestern Bell Telecommunications, Inc.
    Inventors: John C. Coons, Jean M. Beirise