Patents by Inventor Po-Tseng Chang

Po-Tseng Chang 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).

  • Ornamental ball
    Patent number: 5811159
    Abstract: An ornamental ball includes a spherical body consisting of two semi-spherical half bodies, and an inner ornamental member contained in the ball. The inner ornamental member is fixed inside the ball, having an axis shorter than the diameter of the ball and having two ends of the axis fixed at non-diametrical locations of an inner surface of the ball. Consequently, the ball rotates irregularly owning to the gravitational impact of the ornamental member.
    Type: Grant
    Filed: April 16, 1997
    Date of Patent: September 22, 1998
    Assignee: Kuo Jung Lin
    Inventor: Po-Tseng Chang