Patents by Inventor James A. Kallio

James A. Kallio 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 demodulating circuit tracer
    Patent number: 4998059
    Abstract: A non intrusive circuit tracer for positively identifying a conductor at ition remote from a point of injection of a test signal. Tracer signal is alternately injected into two conductors at a rate of alternation which is substantially less than the tracer frequency. At another point along the conductor signal is sampled and synchronously demodulated first with respect to the tracer frequency and then with respect to the rate of alternation of the tracer frequency between conductors.
    Type: Grant
    Filed: March 28, 1990
    Date of Patent: March 5, 1991
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Richard T. Nigon, David P. Bochinski, Roy H. Long, Jr., James A. Kallio