Patents by Inventor Paul V. Marshall

Paul V. Marshall 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 providing RFI/EMI isolation between adjacent circuit areas on a single circuit board
    Patent number: 5252782
    Abstract: A sensitive circuit area on a circuit board is isolated from an adjacent located non-sensitive circuit area by surrounding the sensitive circuit area with electrically interconnected ground planes positioned on the opposite sides of the circuit board. The isolation system further includes a "clam shell" RF/IF tight shield attached to each side of the circuit board enclosing the sensitive circuit area. A partially conductive gasket is placed between the clam shell and the top and bottom circuit board surfaces to enhance isolation performance.
    Type: Grant
    Filed: June 29, 1992
    Date of Patent: October 12, 1993
    Assignee: E-Systems, Inc.
    Inventors: Gregory A. Cantrell, Paul V. Marshall, David L. Parks