Patents by Inventor Jeffery J. Campbell

Jeffery J. Campbell 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).

  • Volleyball training apparatus
    Patent number: 6659893
    Abstract: A collapsible frame supports a first and second net useful for practicing various volleyball maneuvers. The first net is attached such that it acts as a standard volleyball net and the second net is attached behind the first net such that it catches and holds volleyballs hit over the first net. The entire apparatus can be disassembled making it convenient for storing and portable to any desired location.
    Type: Grant
    Filed: June 22, 2001
    Date of Patent: December 9, 2003
    Assignee: Airborne Athletics, Inc.
    Inventors: Douglas B. Campbell, Jeffery J. Campbell