Patents by Inventor Hugh C. Dunlop

Hugh C. Dunlop 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).

  • Mobile radio with transmit command control and mobile radio system
    Patent number: 5612955
    Abstract: A mobile radio for operation in a system includes a plurality of mobile radios, in which each mobile radio transmits, selectively, traffic frames containing traffic data responsive to inputting of information to the mobile radio when the mobile radio is in an active transmit state of operation, and silence descriptor frames responsive to absence of input information when the mobile radio is in active transmit state of operation. The mobile radio includes: a transmitter for transmitting traffic on a radio channel; a receiver for monitoring signals on the radio channel; a control input for inputting a transmit command; a controller, responsive to the receiver and responsive to the control input, for controlling the transmitter, where the controller is arranged to enable activation of the transmitter, when the receiver detects continuous silence descriptor frames on the radio channel for a predetermined duration and a transmit channel command is input at the control input.
    Type: Grant
    Filed: March 21, 1995
    Date of Patent: March 18, 1997
    Assignee: Motorola, Inc.
    Inventors: Julian V. Fernandes, Hugh C. Dunlop