Patents Assigned to Hong Shing Holdings Company Limited
  • Air purifier
    Patent number: D529160
    Type: Grant
    Filed: May 6, 2005
    Date of Patent: September 26, 2006
    Assignees: Hong Shing Holdings Company Limited, Le Hong Po Company Limited
    Inventors: Chuang Li, Yong Du, Hong Li
  • Metallic dust-collecting plates
    Patent number: D532504
    Type: Grant
    Filed: May 24, 2005
    Date of Patent: November 21, 2006
    Assignees: Hong Shing Holdings Company Limited, Le Pong Ho Company Limited
    Inventors: Hong Li, Chuang Li, Yong Du
  • Metallic dust-collecting plates
    Patent number: D532505
    Type: Grant
    Filed: May 24, 2005
    Date of Patent: November 21, 2006
    Assignees: Hong Shing Holdings Company Limited, Le Pong Holdings Company Limited
    Inventors: Hong Li, Chuang Li, Yong Du