Patents by Inventor Jerold Dennis Dwire

Jerold Dennis Dwire 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).

  • Digital frequency shift key modulator
    Patent number: 3991389
    Abstract: A frequency shift key modulator producing sine wave output signals of different frequencies for mark (1) and space (0) signal levels on an input "send data" lead including a counter which divides the frequency of an input oscillator by different denominators for the mark and space signals and the output of which is synthesized to produce a stepped output approximating a sine wave and a final filter for smoothing the steps out of the output. In cases in which the mark and space output frequencies are approximately in the ratio of 1 to 2, a frequency divider is used for the mark output frequencies.
    Type: Grant
    Filed: September 18, 1974
    Date of Patent: November 9, 1976
    Assignee: International Business Machines Corporation
    Inventors: Jerold Dennis Dwire, Townsend Henry Porter, Jr.