Patents by Inventor James W. Dejmek

James W. Dejmek 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).

  • Diversity repeater diagnostic method and apparatus
    Patent number: 5263175
    Abstract: A diversity repeater that incorporates diversity diagnostic circuitry. The diversity diagnostic circuitry monitors the outputs of at least two receivers and determines the signal strength of the transmissions received by each receiver. If the signal strength for a particular receiver is below a predetermined threshold, the diversity diagnostic circuitry determines whether that receiver is receiving a rayleigh faded transmission or is an inoperative mode.
    Type: Grant
    Filed: September 28, 1990
    Date of Patent: November 16, 1993
    Assignee: Motorola, Inc.
    Inventor: James W. Dejmek
  • Voice messaging method for selective call receivers
    Patent number: 5068898
    Abstract: Accelerated throughput of voice messages is accomplished by first filtering a normal 50-3000 Hz voice signal to a reduced bandwidth 350-1650 Hz (with loss of identifying features), the reduced signal then accelerated X3 and translated downward to bandwidth 50-3950 Hz for transmission. The receiver recovers the 350-1650 Hz signal.
    Type: Grant
    Filed: December 26, 1989
    Date of Patent: November 26, 1991
    Assignee: Motorola, Inc.
    Inventors: James W. Dejmek, Ronald A. Craig