Patents by Inventor Patrick E. Bartell

Patrick E. Bartell 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).

  • Apparatus for parallel combining an odd number of semiconductor devices
    Patent number: 4251784
    Abstract: The collectors or the bases of three RF power transistors, each mounted on a separate substrate, are connected in parallel by means of transmission line segments connected so that the current flowing in the center transistor splits evenly and joins the current from the end transistors at an initial combining point, which points are then connected to a final combining point to provide the shortest transmission lines to the initial and final combining points.
    Type: Grant
    Filed: December 17, 1979
    Date of Patent: February 17, 1981
    Assignee: Motorola, Inc.
    Inventors: Roland C. Luetzelschwab, Patrick E. Bartell