Patents by Inventor Matthew J. Harrigan

Matthew J. Harrigan 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).

  • Roller skate exercise device
    Patent number: 5451194
    Abstract: A roller skate exercise device is provided which consists of a platform having a top surface to support a pair of roller skates worn by a person. Components are for permitting the roller skates to slide in opposed reciprocatory motions on the top surface of the platform, so as to simulate cross country skiing.
    Type: Grant
    Filed: July 21, 1993
    Date of Patent: September 19, 1995
    Inventor: Matthew J. Harrigan