Patents by Inventor Chak Wa Hung

Chak Wa Hung 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).

  • Insole
    Patent number: D551437
    Type: Grant
    Filed: August 10, 2006
    Date of Patent: September 25, 2007
    Assignee: Rongyi Cai
    Inventor: Chak Wa Hung
  • Insole
    Patent number: D551835
    Type: Grant
    Filed: August 10, 2006
    Date of Patent: October 2, 2007
    Assignee: Rongyi Cai
    Inventor: Chak Wa Hung