Patents by Inventor Kwok Choi Tsang

Kwok Choi Tsang 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: 6200656
    Abstract: According to the present invention, an artificial tree is provided which includes a tree element having a central generally disc-shaped member and a plurality of generally annular rings concentric to the central disc-shaped member and to one another such that the central disc-shaped member and the rings, in the operative position, are positioned in a vertically spaced, tiered array, with the central disc-shaped member at an uppermost position such that the tiered array is configured to have a tree-shape. A plurality of connecting strips connect each tier of the array to a next adjacent tier of the array. The disc-shaped member, the concentric rings, and the connecting strips may be formed from a unitary sheet of material, and the disc-shaped member and the concentric rings may be formed by providing a plurality of discontinuous generally spiral slits in the sheet of material.
    Type: Grant
    Filed: June 4, 1999
    Date of Patent: March 13, 2001
    Assignee: Wellpak Technical Development Limited
    Inventor: Kwok Choi Tsang
  • Patent number: D442115
    Type: Grant
    Filed: June 4, 1999
    Date of Patent: May 15, 2001
    Assignee: Wellpak Technical Development Limited
    Inventor: Kwok Choi Tsang