Patents by Inventor Stacie F. Mathis

Stacie F. Mathis 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).

  • Self-testing power supply which indicates when an output voltage is within tolerance while not coupled to an external load
    Patent number: 7216241
    Abstract: A power supply unit according to a preferred embodiment of the invention is self testing. The power supply unit is enabled to function with no external loads applied, and includes a visual indicator of whether or not one or more voltage outputs of the power supply unit is within tolerance. To benefit from the self-test feature, a user in the field may simply unplug the power supply unit from all loads, plug the unit into an A/C source, and observe the visual indicator. If the visual indicator is lit, then the user may reasonably assume that the power supply unit is functioning correctly. But if the visual indicator is not lit, then the user may reasonably assume that the power supply unit is faulty.
    Type: Grant
    Filed: July 30, 2004
    Date of Patent: May 8, 2007
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Samuel Martin Babb, Jeffrey Scott Weaver, Stacie F. Mathis, Kelly J. Pracht