Patents by Inventor Mark J. Knapp

Mark J. Knapp 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).

  • Ratcheting screwdriver handle
    Patent number: D421888
    Type: Grant
    Filed: May 20, 1999
    Date of Patent: March 28, 2000
    Assignee: Snap-on Tools Company
    Inventors: Christopher D. Thompson, Joseph R. Hoepfl, Mark J. Knapp