Patents by Inventor Charles R. Collis

Charles R. Collis 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).

  • Forming isolation resistors with resistive elastomers
    Patent number: 5142449
    Abstract: An elastomeric element, having alternating layers of resistive and insulating material, is used to form isolation resistors. A surface of the elastomeric element is contacted with a conductor carrying electrical signals. Another surface is applied to the terminals of a semiconductor component thereby coupling the signals to the semiconductor component through the resistors formed by the elastomeric element.
    Type: Grant
    Filed: October 1, 1990
    Date of Patent: August 25, 1992
    Assignee: Motorola, Inc.
    Inventors: Hugh W. Littlebury, Charles R. Collis