Patents by Inventor Charles Yao Chung Chang

Charles Yao Chung 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).

  • File storage rolling cart
    Patent number: D747837
    Type: Grant
    Filed: December 17, 2014
    Date of Patent: January 19, 2016
    Assignee: OCEANSTAR DESIGN GROUP INC.
    Inventor: Charles Yao Chung Chang
  • Laundry hamper
    Patent number: D760979
    Type: Grant
    Filed: December 17, 2014
    Date of Patent: July 5, 2016
    Assignee: OCEANSTAR DESIGN GROUP INC.
    Inventor: Charles Yao Chung Chang
  • Laundry sorter
    Patent number: D762336
    Type: Grant
    Filed: November 12, 2014
    Date of Patent: July 26, 2016
    Assignee: OCEANSTAR DESIGN GROUP INC.
    Inventor: Charles Yao Chung Chang