Patents by Inventor Chen Renfu

Chen Renfu 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).

  • Smart gel tool handle
    Patent number: D638268
    Type: Grant
    Filed: May 21, 2010
    Date of Patent: May 24, 2011
    Assignee: Alterra Tools Ltd.
    Inventor: Chen Renfu
  • Foldable weeder
    Patent number: D646131
    Type: Grant
    Filed: May 18, 2010
    Date of Patent: October 4, 2011
    Assignee: Alterra Tools Ltd.
    Inventor: Chen Renfu