Patents by Inventor David E Douglas

David E Douglas 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).

  • Multiple positioned light source to achieve uniform or graded illumination
    Patent number: 7862195
    Abstract: An integrated and modular lighting system is disclosed. The lighting system includes a plurality of modules, each module including at least two echelons of light emitting diodes and a power supply on a common substrate. The modular lighting system is used to provide uniform illumination of an enclosed display stand.
    Type: Grant
    Filed: October 9, 2007
    Date of Patent: January 4, 2011
    Inventors: Thomas E Stack, David E Douglas, Samuel S Lee