Patents by Inventor Ting Hu Chang

Ting Hu 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).

  • Optical-mechanical roller with ratchet
    Patent number: 6429848
    Abstract: A pointing device, such as a mouse, track ball or joystick, having a roller. The roller itself has either a plurality of slits or reflective strips for optical detection. A photoemitter and photodetector are positioned to detect rotation of the roller. Thus, the present invention eliminates the need for coupling to a separate optical encoder. The roller can be depressed to cause the actuation of a microswitch. In a preferred embodiment, the photoemitter and photodetector are aligned along a vertical axis, such that the position information is not affected by the vertical depressing of the roller.
    Type: Grant
    Filed: December 1, 2000
    Date of Patent: August 6, 2002
    Assignee: Logitech Europe S.A.
    Inventors: Antoine A. Merminod, Marc A. Bidiville, Ting Hu Chang
  • Optical-mechanical roller with ratchet
    Publication number: 20010020932
    Abstract: A pointing device, such as a mouse, track ball or joystick, having a roller. The roller itself has either a plurality of slits or reflective strips for optical detection. A photoemitter and photodetector are positioned to detect rotation of the roller. Thus, the present invention eliminates the need for coupling to a separate optical encoder. The roller can be depressed to cause the actuation of a microswitch. In a preferred embodiment, the photoemitter and photodetector are aligned along a vertical axis, such that the position information is not affected by the vertical depressing of the roller.
    Type: Application
    Filed: December 1, 2000
    Publication date: September 13, 2001
    Inventors: Antoine A. Merminod, Marc A. Bidiville, Ting Hu Chang
  • Optical-mechanical roller with ratchet
    Patent number: 6157369
    Abstract: A pointing device, such as a mouse, track ball or joystick, having a roller. The roller itself has either a plurality of slits or reflective strips for optical detection. A photoemitter and photodetector are positioned to detect rotation of the roller. Thus, the present invention eliminates the need for coupling to a separate optical encoder. The roller can be depressed to cause the actuation of a microswitch. In a preferred embodiment, the photoemitter and photodetector are aligned along a vertical axis, such that the position information is not affected by the vertical depressing of the roller.
    Type: Grant
    Filed: October 14, 1997
    Date of Patent: December 5, 2000
    Assignee: Logitech, Inc.
    Inventors: Antoine A. Merminod, Marc A. Bidiville, Ting Hu Chang