Patents by Inventor Cheng Ching Hung

Cheng Ching 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).

  • Tool handle
    Patent number: D542619
    Type: Grant
    Filed: June 12, 2006
    Date of Patent: May 15, 2007
    Inventor: Cheng Ching Hung
  • Handle for rotary ratchet tool
    Patent number: D556007
    Type: Grant
    Filed: June 14, 2006
    Date of Patent: November 27, 2007
    Inventor: Cheng Ching Hung