Patents Assigned to Alterra Tools Ltd.
  • 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