Patents by Inventor Joy C. Chen

Joy C. Chen 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).

  • Flashlight head and tail cap with hook
    Patent number: D506559
    Type: Grant
    Filed: September 23, 2004
    Date of Patent: June 21, 2005
    Assignee: Pentagon Scientific Corporation
    Inventor: Joy C. Chen
  • Flashlight head and polygonal tail
    Patent number: D507367
    Type: Grant
    Filed: September 23, 2004
    Date of Patent: July 12, 2005
    Assignee: Pentagon Scientific Corporation
    Inventor: Joy C. Chen