Patents by Inventor Dean H. Wickwire

Dean H. Wickwire 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).

  • Die drawing process and apparatus for piezoelectric polymer films and tubes
    Patent number: 4800048
    Abstract: Apparatus and processes for preparing polymeric piezoelectric films of one or more layers or tubular products having a central wire core by drawing a suitable polymeric blank through either a flat or a conically tapered drawing die having associated electrical field producing means, to simultanelusly stretch and pole the polymeric material within the die chamber.
    Type: Grant
    Filed: November 30, 1987
    Date of Patent: January 24, 1989
    Assignee: Pennwalt Corporation
    Inventors: Philip E. Bloomfield, Richard A. Ferren, Dean H. Wickwire