Patents by Inventor Ruben Trujillo

Ruben Trujillo 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).

  • Apparatus and method for calibrated monitoring of output voltage levels of local area network communication devices
    Patent number: 4890278
    Abstract: Apparatus and method are disclosed for providing a calibrated measurement of signals applied to a local area network cable segment. A remote segment monitor unit has the signal sampling circuit coupled to a signal generating unit. The signal generating unit is controlled by a network system member (node) and applies a series of known signal levels to the signal sampling circuit of the remote segment monitor unit. The known signal levels from the signal generating unit and the signal levels measured by the remote segment monitor as a result of the known signal levels are compared and an appropriate scale factor entered in the processing circuit of the remote segment monitor. Using the calibrated remote segment monitor, the location of network nodes can be identified from the signal levels measured by the remote segment monitor.
    Type: Grant
    Filed: June 16, 1989
    Date of Patent: December 26, 1989
    Assignee: Digital Equipment Corporation
    Inventors: Michael A. Felker, Angelo N. Viverito, John W. Gilstrap, Jesus J. Martos, Ruben Trujillo, Chang J. Wang