Patents by Inventor Chang Shu-Yun

Chang Shu-Yun 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).

  • Double blade windshield wiper
    Patent number: D334161
    Type: Grant
    Filed: March 13, 1991
    Date of Patent: March 23, 1993
    Inventors: Shu-Chen Wu, Chang Shu-Yun
  • Double-blade windshield wiper
    Patent number: D336739
    Type: Grant
    Filed: March 13, 1991
    Date of Patent: June 22, 1993
    Inventors: Shu-Chen Wu, Chang Shu-Yun