Patents by Inventor Willis D. De Hart

Willis D. De Hart 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).

  • Antijam communications system
    Patent number: 3984774
    Abstract: 1. An antijam, two-way communications station comprising a radiant energy ansmitter and receiver, a signal source connected to said transmitter, a signal subtractor having one input connected to said signal source, another input connected to said receiver and an output, means for selectively connecting said transmitter to said receiver and the output of said signal source for establishing a degenerative feedback loop for noise-free transmission and reception with another station of substantially the same type.
    Type: Grant
    Filed: January 14, 1959
    Date of Patent: October 5, 1976
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Willis D. De Hart