Patents by Inventor Chan-Keng Cheng

Chan-Keng Cheng 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).

  • Lamp base
    Patent number: D372328
    Type: Grant
    Filed: June 26, 1995
    Date of Patent: July 30, 1996
    Assignee: Donguan Juguan Metal Lighting Factory Co., Ltd.
    Inventor: Chan-Keng Cheng
  • Lamp base
    Patent number: D372329
    Type: Grant
    Filed: June 26, 1995
    Date of Patent: July 30, 1996
    Assignee: Donguan Juguan Metal Lighting Factory Co., Ltd.
    Inventor: Chan-Keng Cheng
  • Lamp base
    Patent number: D372330
    Type: Grant
    Filed: June 26, 1995
    Date of Patent: July 30, 1996
    Assignee: Donguan Juguan Metal Lighting Factory Co., Ltd.
    Inventor: Chan-Keng Cheng
  • Lamp base
    Patent number: D372331
    Type: Grant
    Filed: June 26, 1995
    Date of Patent: July 30, 1996
    Assignee: Donguan Juguan Metal Lighting Factory Co., Ltd.
    Inventor: Chan-Keng Cheng