Patents by Inventor Zong Ta Chang

Zong Ta 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).

  • Kitchen sink
    Patent number: D401310
    Type: Grant
    Filed: December 29, 1997
    Date of Patent: November 17, 1998
    Inventor: Zong Ta Chang
  • Kitchen sink
    Patent number: D402014
    Type: Grant
    Filed: January 26, 1998
    Date of Patent: December 1, 1998
    Inventor: Zong Ta Chang