Patents by Inventor David C. Plank

David C. Plank 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).

  • Adjustable press face
    Patent number: 4806140
    Abstract: An adjustable shaping mold is provided with an externally positioned adjusting arrangement. All adjustments to the curved configuration of the shaping surface of the mold are done without having to adjust any portion of the adjusting mechanism that is positioned between the flexible shaping member and rigid mounting plate of the mold.
    Type: Grant
    Filed: December 21, 1987
    Date of Patent: February 21, 1989
    Assignee: PPG Industries, Inc.
    Inventors: George C. Krug, Donald J. Beeler, David C. Plank, Robert W. Sitman, Walter F. Shauf, Robert F. Pike