Patents by Inventor Charles F. Zimmerman

Charles F. Zimmerman 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).

  • Polygonal cutting insert
    Patent number: 4787784
    Abstract: A polygonal indexable cutting insert has a chip breaker with a backwall arranged in a sinuous path so as to deflect chips in a direction toward the center of the insert.
    Type: Grant
    Filed: August 3, 1987
    Date of Patent: November 29, 1988
    Assignee: GTE Valenite Corporation
    Inventors: Thomas J. Bernadic, Tony M. Lowe, John H. Patterson, Karl A. Kathi, Charles F. Zimmerman, Yefim Val