Patents by Inventor Sen-Der Cheng

Sen-Der Cheng 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).

  • Pieces assembable to form regular hexagons and other figures
    Patent number: 4773649
    Abstract: A set of movable pieces for board game include a pair of similar triangular pieces, a pair of similar pentagonal pieces, a pair of similar rhomboidal pieces, a pair of similar trapezoidal pieces, and a rhombic piece. The set of movable pieces can be assembled side by side to form a regular hexagon which can be divided into three similar rhombi each assembled by three of the set of movable pieces. The regular hexagon can be assembled from the set of movable pieces in different manners. In addition to the regular hexagon, the set of movable pieces can also be assembled to form many other figures like the outlines of animals or natural phenomena.
    Type: Grant
    Filed: May 12, 1987
    Date of Patent: September 27, 1988
    Assignee: Tien-Tsai Huang
    Inventor: Sen-Der Cheng