Patents by Inventor Sing Hai Tang

Sing Hai Tang 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: 5692329
    Abstract: A new design of picture frame that levitates and rotates in the air without mechanical support is described. A permanent magnet (5) is mounted on the top of the picture frame (2) such that the center of the magnet coincides with a vertical axis through the center of gravity of the picture frame. The picture frame is positioned below and within an outer fixed framework (1). An electro-magnet (3) is mounted on the top of the fixed framework such that the center of the electro-magnet (3) coincides with the said vertical axis. An additional set of electro-magnet on the fixed framework (8, 10) and permanent magnet on the picture frame (6, 10) are employed for nearly periodic rotation of the picture frame.
    Type: Grant
    Filed: November 17, 1995
    Date of Patent: December 2, 1997
    Inventor: Sing Hai Tang