Patents by Inventor Christopher Eric Papke

Christopher Eric Papke 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).

  • AC switch with zero off current for EL panel
    Patent number: 7843140
    Abstract: A power supply for driving an EL panel includes an inverter that produces a polarity reversing voltage at a pair of output terminals. A switching circuit coupled to the output terminals and to at least one EL lamp applies alternating current to the at least one EL lamp in the on state and blocks current from the EL lamp in the off state. The switching circuit includes a first bidirectional switch connecting a first terminal of the EL lamp to a first output terminal and a second bidirectional switch connecting a second terminal of the EL lamp to a second output terminal.
    Type: Grant
    Filed: October 27, 2005
    Date of Patent: November 30, 2010
    Assignee: Rogers Corporation
    Inventors: Christopher Eric Papke, Harold Gee Yee, Robert Allen Kimball