Patents by Inventor Ross Ortman

Ross Ortman 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).

  • Method and apparatus for testing VCR servos
    Patent number: 5266893
    Abstract: The capstan and drum servo systems of a VCR are tested by processing the capstan reference signal and the drum reference signal in a microprocessor and displaying information which is useful in diagnosing any defects in either of the servo systems.
    Type: Grant
    Filed: April 16, 1991
    Date of Patent: November 30, 1993
    Inventors: Ross Ortman, Corwyn R. Meyer
  • Capacitance measuring method and apparatus
    Patent number: 4825147
    Abstract: A train of constant current pulses is applied to a capacitor to raise the voltage across the capacitor from a first predetermined level to a second predetermined level. The voltage across the capacitor is measured only during the intervals between the current pulses, and the number of applied pulses is counted and used to calculate the capacitance of the capacitor.
    Type: Grant
    Filed: September 14, 1988
    Date of Patent: April 25, 1989
    Assignee: Sencore, Inc.
    Inventors: Terry D. Cook, Ross Ortman