Patents by Inventor James D. Terrell

James D. Terrell 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).

  • Electromagnetic intrusion sensor
    Patent number: 4054871
    Abstract: An electromagnetic intrusion sensor for detecting the presence of moving ects within a specified detection range by sensing the interaction between the moving objects and an electromagnetic field generated by the sensor.
    Type: Grant
    Filed: September 9, 1974
    Date of Patent: October 18, 1977
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: James D. Terrell, Richard O. Giorgis