Patents by Inventor Hans Guo

Hans Guo 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).

  • Toothbrush
    Patent number: D451679
    Type: Grant
    Filed: January 25, 2001
    Date of Patent: December 11, 2001
    Assignee: Colgate-Palmolive Company
    Inventor: Han Guo Ping
  • Toothbrush
    Patent number: D452079
    Type: Grant
    Filed: January 23, 2001
    Date of Patent: December 18, 2001
    Assignee: Colgate-Palmolive Company
    Inventor: Han Guo Ping
  • Toothbrush
    Patent number: D453997
    Type: Grant
    Filed: January 25, 2001
    Date of Patent: March 5, 2002
    Assignee: Colgate Palmolive Company
    Inventor: Han Guo Ping
  • Toothbrush
    Patent number: D453998
    Type: Grant
    Filed: January 25, 2001
    Date of Patent: March 5, 2002
    Assignee: Colgate-Palmolive Company
    Inventor: Han Guo Ping
  • Toothbrush
    Patent number: D454697
    Type: Grant
    Filed: January 12, 2001
    Date of Patent: March 26, 2002
    Assignee: Colgate-Palmolive Company
    Inventor: Han Guo Ping
  • Toothbrush
    Patent number: D457324
    Type: Grant
    Filed: March 12, 2001
    Date of Patent: May 21, 2002
    Assignee: Colgate-Palmolive Company
    Inventor: Han Guo Ping