Patents by Inventor Tsai Chien-Nan

Tsai Chien-Nan 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).

  • Mechanism for exercising legs
    Patent number: 5372563
    Abstract: A mechanism for exercising legs includes a housing, an eccentric wheel rotatably disposed in the housing, a follower engaged with the eccentric wheel and moved in a reciprocating way by the eccentric wheel, a board slidably supported in the housing and having a rack formed in the upper surface, a support rotatably supported on the housing and having a rack formed in the bottom for engaging with the rack of the board, the support is rotated when the eccentric wheel is rotated so as to massage and exercise the legs of the users.
    Type: Grant
    Filed: December 21, 1993
    Date of Patent: December 13, 1994
    Inventor: Tsai Chien-Nan