Patents by Inventor Chu Li-Tsan

Chu Li-Tsan 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: 5630763
    Abstract: A golf training ball comprising at least two cloth stuffed elements each element featuring a sealing point and, stitching to combine the cloth stuffed elements into a unitary ball, where the stuffing comprises a soft fiber, and the cloth elements and stitching are so arranged such that the unitary ball has a core and a periphery with a density gradient between the core and periphery where the golf training ball has a heavier mass in the core and a lesser mass of a soft structure at its periphery to provide a high shock absorbing ability.
    Type: Grant
    Filed: February 27, 1996
    Date of Patent: May 20, 1997
    Inventor: Chu Li-Tsan