Patents by Inventor John Raymond Nelson

John Raymond Nelson 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).

  • Dual mode receiver
    Patent number: 4063173
    Abstract: A transponder including a receiver and a transmitter controlled by the output of the receiver, with the receiver including a first phase locked loop with a mixer and a voltage controlled oscillator supplying an output to a second phase locked loop including a switchable frequency divider connected to supply a low side injection signal to the mixer of the first loop in the first mode of operation and a high side injection signal to the mixer in the second mode of operation.
    Type: Grant
    Filed: April 1, 1976
    Date of Patent: December 13, 1977
    Assignee: Motorola, Inc.
    Inventors: John Raymond Nelson, James Robert Shaner, Don Reginald Holcomb