Patents by Inventor Yang Jack Chang

Yang Jack 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).

  • Loudspeaker
    Patent number: D673527
    Type: Grant
    Filed: August 26, 2011
    Date of Patent: January 1, 2013
    Assignee: GP Acoustics International Limited
    Inventors: Simon Davies, Patrick Ho, Yang Jack Chang, Graham Allen
  • Loudspeaker
    Patent number: D674780
    Type: Grant
    Filed: August 26, 2011
    Date of Patent: January 22, 2013
    Assignee: GP Acoustics International Limited
    Inventors: Simon Davies, Patrick Ho, Yang Jack Chang, Graham Allen
  • Loudspeaker
    Patent number: D676025
    Type: Grant
    Filed: August 26, 2011
    Date of Patent: February 12, 2013
    Assignee: GP Acoustics International Limited
    Inventors: Simon Davies, Patrick Ho, Yang Jack Chang, Graham Allen
  • Loudspeaker
    Patent number: D678245
    Type: Grant
    Filed: August 26, 2011
    Date of Patent: March 19, 2013
    Assignee: GP Acoustics International Limited
    Inventors: Simon Davies, Patrick Ho, Yang Jack Chang, Graham Allen
  • Loudspeaker
    Patent number: D678866
    Type: Grant
    Filed: August 26, 2011
    Date of Patent: March 26, 2013
    Assignee: GP Acoustics International Limited
    Inventors: Simon Davies, Patrick Ho, Yang Jack Chang, Graham Allen
  • Loudspeaker
    Patent number: D687412
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: August 6, 2013
    Assignee: GP Acoustics International Limited
    Inventors: Simon Davies, Patrick Ho, Yang Jack Chang, Graham Allen