Patents by Inventor Key Shimizu

Key Shimizu 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 ski having a bridle
    Patent number: 4460187
    Abstract: A pair of roller skis, each roller including an elongated plate having a cambered front end, a pivotally mounted front wheel spring biased to maintain rotation in the longitudinal direction of the ski, and a pair of coaxial rear wheels. The elongated plate extends rearward of the rear wheels and mounted thereto is a break head. The top of the cambered front end of the elongated plate of each ski is fixed to opposite ends of a bridle to be held by the rider of the ski for improved control of the skis.
    Type: Grant
    Filed: October 1, 1981
    Date of Patent: July 17, 1984
    Inventor: Key Shimizu