Patents by Inventor Hans G. Ludwig

Hans G. Ludwig 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).

  • R.F. impedance match control system
    Patent number: 4621242
    Abstract: An R.F. impedance match control system. The reflection coefficient of the system is compared to a threshold to determine a mismatch condition which is corrected by selectively changing in incremental steps the turns ratio of an autotransformer provided at the input to the load until the mismatch condition is corrected. Timing means are provided to delay each mismatch correction until initial transient conditions are stabilized and to shut off R.F. power during each turns ratio change.
    Type: Grant
    Filed: March 19, 1984
    Date of Patent: November 4, 1986
    Assignee: The Perkin-Elmer Corporation
    Inventors: C. Earle Theall, Jr., Hans G. Ludwig, Michael J. Gustin