Patents by Inventor Mark Maxfield

Mark Maxfield 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).

  • High-frequency induction heating power supply
    Patent number: 5773799
    Abstract: A high-frequency power supply which is primarily intended for use with an inductive heating apparatus. The high-frequency power supply has a pre-regulator for emitting a constant output voltage, an inverter for generating a constant output voltage, and an output network for amplifying the constant output voltage and converting the constant output voltage to a high-frequency constant output current. The power supply disclosed generates a very high frequency ac output, drives a wide range of possible loads, minimizes root mean square input current for a given output power, and can be powered from a wide range of input power sources.
    Type: Grant
    Filed: April 1, 1996
    Date of Patent: June 30, 1998
    Assignee: Gas Research Institute
    Inventors: Mark Maxfield, Frank A. Doljack