Patents by Inventor Jack Yang Chang

Jack Yang 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).

  • Headphone
    Patent number: D704162
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: May 6, 2014
    Assignee: GP Acoustics International Limited
    Inventors: John Simon Davies, Jack Yang Chang
  • Loudspeaker
    Patent number: D770414
    Type: Grant
    Filed: May 14, 2014
    Date of Patent: November 1, 2016
    Assignee: GP ACOUSTICS INTERNATIONAL LIMITED
    Inventors: John Simon Davies, Patrick Hung Yan Ho, Eddy Rinna, Jack Yang Chang