Patents by Inventor William J. Knapper, II

William J. Knapper, II 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).

  • Portable target system
    Patent number: 5280920
    Abstract: A portable, reusable, disposable, compact package that opens up and reconnects to form an upright target and sight-in system for guns.
    Type: Grant
    Filed: September 3, 1992
    Date of Patent: January 25, 1994
    Inventor: William J. Knapper, II