Patents by Inventor John W. Sondreal

John W. Sondreal 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).

  • Hopping and dancing shoes
    Patent number: 4457084
    Abstract: A hopping and dancing shoe comprises a sole member, a base member parallel thereto, and a spring therebetween. Two means are provided by the spring to resist yawing of the sole member relative to the base member: (1) the spring has an axial extension of each end which is connected to the sole member and base member, respectively; and (2) the extreme outer coils of the spring are in contact with the sole member and base member, respectively, to provide frictional contact there between.
    Type: Grant
    Filed: April 8, 1981
    Date of Patent: July 3, 1984
    Inventors: Hiroshi Horibata, John W. Sondreal, Henry Chu