Patents by Inventor John S. Foote

John S. Foote 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).

  • Switch matrix test and control system
    Patent number: 4573152
    Abstract: A switch matrix system is described with which peripheral devices can be conveniently tested for compatibility with central processor units. A diagnostic channel is provided to which a peripheral device to be tested is connected at a crosspoint in the switch matrix system. A control provides a sequence of signals needed to establish data communication between the central processor unit and the peripheral device. Errors or failures in the sequence are detected and stored and displayed with a terminal from which the switch matrix system is operated. Additional testing is done by generating bit test patterns and comparing the returns with those sent out. A channel activity monitor is employed in the switch matrix system to enable a comparative review of activity of channels from different central processor units.
    Type: Grant
    Filed: May 13, 1983
    Date of Patent: February 25, 1986
    Inventors: Richard E. Greene, Gladstone F. Young, Gary E. Tom, Harry G. Schaffer, John S. Foote