Patents by Inventor Ming Chen Chang

Ming Chen 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).

  • Pointing device with a rollable device and light source
    Publication number: 20020018045
    Abstract: A pointing device is electrically connect to a computer. The pointing device is used to control movements of a cursor on a display device of the computer. The pointing device has a housing, a pointing unit installed inside the housing to generate pointing signals to control the movements of the cursor, a rollable device for generating rolling signals, a light source for illuminating the rollable device, and a control unit for controlling the pointing device. When the computer transmits a state signal to the pointing device, the control unit controls the light source to determine an illumination mode of the rollable device according to the state signal.
    Type: Application
    Filed: June 19, 2001
    Publication date: February 14, 2002
    Inventors: Ding Jong Wang, Kuang Kai Liang, Pin Cheng Chou, Ming Chen Chang