Patents by Inventor John C. Steffl

John C. Steffl 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).

  • Castering wheels for roller skates
    Patent number: 5026080
    Abstract: An improved skateboard is provided and consists of a deck having a tail and a nose. A pair of rear wheels fixed against swivelling are attached to underside of the deck at the tail which do not swivel. A pair of front casters are attached to underside of the deck at the nose which swivel together at forty five degrees in either direction for increased maneuverability of the skateboard. In a second embodiment the pair of front casters are replaced with one caster which can swivel three hundred and sixty degree in either direction.
    Type: Grant
    Filed: March 30, 1990
    Date of Patent: June 25, 1991
    Inventors: John C. Steffl, George Spector