Patents by Inventor Li-Wu Chang

Li-Wu 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 switch apparatus
    Patent number: 6904194
    Abstract: An optical switch apparatus is disclosed, which applies to the optical communication system or optical system for switching the optical path. The optical switch apparatus utilizes a servomotor rotates a circle mirror unit which two surfaces are coated or deposited a reflecting film and has a plurality of holes. Thereby the optical signals are transmitted from the fibers pass through the holes for transmitting to the others fibers, or the optical signals reflex to the others fibers via the reflecting film for switching the optical path.
    Type: Grant
    Filed: April 18, 2003
    Date of Patent: June 7, 2005
    Assignee: Alliance Fiber Optics Products
    Inventors: Chia-Hsiung Chang, Li-Wu Chang, Hong-Jueng King, Huei-Pin Huang, Chwei-Jing Yeh
  • Optical switch apparatus
    Publication number: 20030198430
    Abstract: An optical switch apparatus is disclosed, which applies to the optical communication system or optical system for switching the optical path. The optical switch apparatus utilizes a servomotor rotates a circle mirror unit which two surfaces are coated or deposited a reflecting film and has a plurality of holes. Thereby the optical signals are transmitted from the fibers pass through the holes for transmitting to the others fibers, or the optical signals reflex to the others fibers via the reflecting film for switching the optical path.
    Type: Application
    Filed: April 18, 2003
    Publication date: October 23, 2003
    Applicant: RiTek Corporation
    Inventors: Chia-Hsiung Chang, Li-Wu Chang, Hong-Jueng King, Huei-Pin Huang, Chwei-Jing Yeh