Patents by Inventor Mark Hoffenberg

Mark Hoffenberg 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).

  • Bicycle exercise stand
    Patent number: D304963
    Type: Grant
    Filed: March 13, 1987
    Date of Patent: December 5, 1989
    Assignee: Frontline Technology, Inc.
    Inventors: Bruce A. Sargeant, Robert Reasons, Mark Hoffenberg, Robert Walpert, James Lindsay