Patents by Inventor John C. Berti

John C. Berti has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Arrangement and method for establishing radio communication in a system
    Patent number: 4409687
    Abstract: Communication between a first radio transmitter and receiver and a second radio transmitter and receiver is provided by a system repeater. An arrangement for each radio transmitter and receiver in the system establishes communication on a radio frequency channel selected from a plurality of such channels. When an arrangement is in an idle or receive mode, it causes the associated receiver to search the channels for a predetermined group tone or tones assigned to each receiver. When the predetermined group tone or tones are received on a channel, the arrangement enables the associated transmitter and receiver on that channel. When an arrangement is in a call originate or transmit mode, it causes the associated receiver to search for an idle or unused channel.
    Type: Grant
    Filed: April 14, 1981
    Date of Patent: October 11, 1983
    Assignee: General Electric Company
    Inventors: John C. Berti, James W. Williams