Patents by Inventor Qingsong Li

Qingsong Li 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).

  • Compact fluorescent lamp
    Publication number: 20030223230
    Abstract: In accordance with an embodiment of the present invention, a compact fluorescent lamp comprises a spiral compact fluorescent tube comprising a plurality of loops, at least one of the plurality of loops having a different cross-sectional width than a cross-sectional width of at least another one of the plurality of loops.
    Type: Application
    Filed: August 6, 2002
    Publication date: December 4, 2003
    Inventor: Qingsong Li
  • Compact fluorescent lamp glass tube
    Patent number: D488874
    Type: Grant
    Filed: May 31, 2002
    Date of Patent: April 20, 2004
    Inventor: Qingsong Li