Patents by Inventor Donald F. Patridge

Donald F. Patridge 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).

  • Induction heating system with split resonance capacitance
    Patent number: 6288378
    Abstract: Induction heating apparatus has a series inductor between an AC source and a parallel tank circuit.
    Type: Grant
    Filed: March 30, 2000
    Date of Patent: September 11, 2001
    Assignee: Powell Power Electronics, Inc.
    Inventors: Donald F. Patridge, Henry W. Koertzen
  • Induction heating apparatus and transformer
    Patent number: 6211498
    Abstract: Induction heating apparatus has a series inductor between an AC source and a parallel tank circuit.
    Type: Grant
    Filed: March 1, 1999
    Date of Patent: April 3, 2001
    Assignee: Powell Power Electronics, Inc.
    Inventors: Donald F. Patridge, Henry W. Koertzen