Patents by Inventor Harold C. Heame, III

Harold C. Heame, III 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).

  • Cascode power switch topologies
    Patent number: 7719055
    Abstract: A normally-off cascode power switch circuit is disclosed fabricated in wide bandgap semiconductor material such as silicon carbide or gallium nitride and which is capable of conducting current in the forward and reverse direction under the influence of a positive gate bias. The switch includes cascoded junction field effect transistors (JFETs) that enable increased gain, and hence blocking voltage, while minimizing specific on-resistance.
    Type: Grant
    Filed: May 10, 2007
    Date of Patent: May 18, 2010
    Assignee: Northrop Grumman Systems Corporation
    Inventors: Ty R. McNutt, John V. Reichl, Harold C. Heame, III, Eric J. Stewart, Stephen D. Van Campen, Victor D. Veliadis