Patents by Inventor David L. Wandrei

David L. Wandrei 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 power solid state programmable load
    Patent number: 5276411
    Abstract: A high power solid state load comprises at least two arrays of solid state switching devices. The switching devices can comprise PIN diodes formed on a semi-conductor wafer. The arrays are connected to two ports of a combiner network and each of the switching devices in the arrays is driven either fully on or fully off in order to provide a load having high power handling capabilities and a large number of discrete impedance states.
    Type: Grant
    Filed: June 1, 1992
    Date of Patent: January 4, 1994
    Assignee: ATN Microwave, Inc.
    Inventors: Charles E. Woodin, Jr., David L. Wandrei