Patents by Inventor Hsin-Chien Chiang

Hsin-Chien Chiang 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 add/drop multiplexer
    Patent number: 6661944
    Abstract: An optical add/drop multiplexer capable of extracting signals from within a specified waveband in a group of signals containing various wavelengths, and then adding back a new set of signals also within the specified waveband. The multiplexer includes an optical filter plate, a plane reflector and three graded-index lenses. Using a single optical filtering plate and a plane reflector to carry out multiple reflections, intra-band isolation of light signals is improved and cost of production is reduced.
    Type: Grant
    Filed: January 13, 2000
    Date of Patent: December 9, 2003
    Assignee: Industrial Technology Research Institute
    Inventors: Shih-Chiang Lin, Wei-Jen Chou, Hsin-Chien Chiang, Jiun-Shyong Wu