Patents by Inventor Theodore E. Johnson, Jr.

Theodore E. Johnson, Jr. 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).

  • Power monitor of RF plasma
    Patent number: 5175472
    Abstract: An RF plasma power monitor that monitor voltage, current and DC bias adjacent the plasma load and processes the sensed data in a digital data processor to provide true power at the load. Provision is also made for the control of an RF power source to maintain power at the load at a preset level irrespective on impedance fluctuations and reflections.
    Type: Grant
    Filed: December 30, 1991
    Date of Patent: December 29, 1992
    Assignee: Comdel, Inc.
    Inventors: Theodore E. Johnson, Jr., Paul W. Rummel