Patents by Inventor Wai-Fai Chin

Wai-Fai Chin 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 scanning device
    Patent number: 6211990
    Abstract: A laser bar code scanner employing a retroreflector in combination with a rotating polygon reflector to increase scan width and reduce curvature in the scanning beam.
    Type: Grant
    Filed: June 16, 1999
    Date of Patent: April 3, 2001
    Assignee: Microscan Systems Incorporated
    Inventors: Wai-Fai Chin, James E. Thomas, Bruce R. Scharf
  • Optical scanning device
    Patent number: 5999301
    Abstract: A laser bar code scanner employing a retroreflector in combination with a rotating polygon reflector to increase scan width and reduce curvature in the scanning beam.
    Type: Grant
    Filed: July 16, 1997
    Date of Patent: December 7, 1999
    Assignee: Microscan Systems Incorporated
    Inventors: Wai-Fai Chin, James E. Thomas, Bruce R. Scharf