Patents Assigned to Teletronics United Inc.
  • Cordless telephone system
    Patent number: 4039760
    Abstract: A duplex voice communication link including controls therefor as provided between a Base Station connected directly to a telephone line of a telephone exchange and a Mobile Unit consisting of a small, compact cordless telephone instrument containing transmitter, receiver and control circuits powered by a rechargeable battery pack. A single logic tone is transmitted and detected for all logical control for ring signals, on-hook and off-hook signals and dial pulses.
    Type: Grant
    Filed: March 11, 1974
    Date of Patent: August 2, 1977
    Assignee: Teletronics United Inc.
    Inventors: L. Duane Gregory, Douglas G. Talley