Patents Assigned to Guangzhou Hansheng Trade Development Co., Ltd.
  • Ladder
    Patent number: D620132
    Type: Grant
    Filed: December 28, 2009
    Date of Patent: July 20, 2010
    Assignee: Guangzhou Hansheng Trade Development Co., Ltd.
    Inventor: Chunwen Han
  • Ladder hinge
    Patent number: D631562
    Type: Grant
    Filed: June 22, 2010
    Date of Patent: January 25, 2011
    Assignee: Guangzhou Hansheng Trade Development Co., Ltd
    Inventor: Chunwen Han