Patents by Inventor Chen-Duo Liu

Chen-Duo Liu 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).

  • Publication number: 20100048279
    Abstract: The present invention is a game system and method including a game machine, a game judge unit and a symbol judge and change unit, wherein the game machine has plural wheels arranged in an array for constituting a symbol set, and each wheel in the symbol set shows a symbol randomly. Moreover, the game judge unit judges and if the symbols of the symbol set conform to a particular rule, a particular amount of bonus game is provided. Then, the game machine runs the bonus game, and each wheel in the symbol set is capable of showing the super symbol randomly. Furthermore, the symbol judge and change unit judges the appearance of super symbol and defines a particular position for the wheel showing the super symbol. Finally, the symbol judge and change unit forces the symbols on the wheels of the particular position to change into an universal symbol respectively.
    Type: Application
    Filed: August 21, 2008
    Publication date: February 25, 2010
    Inventors: Chen-Duo Liu, Ching-Yi Kao
  • Patent number: 7310091
    Abstract: A handwriting pen used in a tablet type handwriting entry device comprises a pen tip, a pen tip position sensor, and a pressure sensor. The pen tip position recognizer captures a main position coordinates as the pen tip taps on a tablet panel, and generates a main position data. The pressure generator senses a press by the pen tip on the tablet, and generates a pressure value. The handwriting pen connects to a main system by a signal transmission line, and the acquired information is transferred to the main system. The main system has a pen stroke simulation apparatus that manipulates the main position data and the pressure value for simulating different pen strokes.
    Type: Grant
    Filed: April 14, 2004
    Date of Patent: December 18, 2007
    Assignee: Acer Incorporated
    Inventors: Chen-Duo Liu, Liang-Wei Ho
  • Publication number: 20050057535
    Abstract: A handwriting pen used in a tablet type handwriting entry device comprises a pen tip, a pen tip position sensor, and a pressure sensor. The pen tip position recognizer captures a main position coordinates as the pen tip taps on a tablet panel, and generates a main position data. The pressure generator senses a press by the pen tip on the tablet, and generates a pressure value. The handwriting pen connects to a main system by a signal transmission line, and the acquired information is transferred to the main system. The main system has a pen stroke simulation apparatus that manipulates the main position data and the pressure value for simulating different pen strokes.
    Type: Application
    Filed: April 14, 2004
    Publication date: March 17, 2005
    Inventors: Chen-Duo Liu, Liang-Wei Ho