Patents by Inventor John Biess

John Biess 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).

  • Multiple feedback control apparatus for power conditioning equipment
    Patent number: 4013939
    Abstract: An improved feedback control system to govern the cyclic operation of the power switch of a non-dissipative power conditioning equipment. The apparatus includes two or three control loops working in unison. The first causes the output DC level to be compared with a reference, and the error amplified for control purposes. The second utilizes the AC component of the voltage across the output filter inductor or the current through the output filter capacitor, and the third loop senses the output transients.
    Type: Grant
    Filed: December 30, 1974
    Date of Patent: March 22, 1977
    Assignee: TRW Inc.
    Inventors: John Biess, Yuan Yu