Patents by Inventor Oscar D. Despe

Oscar D. Despe 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).

  • DC-AC converter for supplementing an AC power source
    Patent number: 4528457
    Abstract: A DC-AC converter for supplying power from a DC power source to a load that is also supplied power by an AC power source. The DC power source is applied to the load with alternating polarity at the frequency and phase of the AC power source. Transients are reduced by limiting the application of the DC power source to the load to less than the duration of each half cycle of the AC power source.
    Type: Grant
    Filed: February 28, 1983
    Date of Patent: July 9, 1985
    Inventors: Donald J. Keefe, Oscar D. Despe