Patents by Inventor Robert E. Callahan

Robert E. Callahan 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).

  • Electrical load management with autogenically transmitted status data
    Patent number: 5107440
    Abstract: To allow a tester to test whether a switching arrangement near a customer's premises has connected and reconnected loads according to load management command signals from a central utility transmitter, a switch autogenically transmits, over and over, status signals indicating the status of the contacts in the switching arrangement.
    Type: Grant
    Filed: September 6, 1990
    Date of Patent: April 21, 1992
    Assignee: Pacific Scientific Company
    Inventors: Robert E. Callahan, Mervyn J. McKee, Craig H. Rosenquist