Patents by Inventor Ralph Jin-Fung Liu

Ralph Jin-Fung Liu 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).

  • Tumbler
    Patent number: D603221
    Type: Grant
    Filed: February 26, 2009
    Date of Patent: November 3, 2009
    Assignee: Thunder Group Inc.
    Inventor: Ralph Jin-Fung Liu
  • Tumbler
    Patent number: D655982
    Type: Grant
    Filed: May 19, 2011
    Date of Patent: March 20, 2012
    Assignee: Thunder Group Inc.
    Inventor: Ralph Jin-fung Liu