Patents by Inventor Robert W. Wallerstein

Robert W. Wallerstein 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).

  • Patent number: 5826350
    Abstract: A shoe for running, cross training and the like includes a base member including a raised front portion and a rearwardly extending sole portion. A U-shaped spring is disposed beneath the raised portion. The spring has tranvsersely extending ends engaging the front portion at respective longitudinally spaced locations. A sole spring element is affixed to the front portion of base member and includes a flexible part overlying, and extending rearwardly beyond, the sole portion of the base member. The flexible part of the sole spring element is disposed at an acute, non-zero angle with respect to the sole portion of the base member.
    Type: Grant
    Filed: July 7, 1997
    Date of Patent: October 27, 1998
    Inventor: Robert W. Wallerstein