Patents by Inventor Graham M. Forsdyke

Graham M. Forsdyke 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).

  • Electrodeless discharge lamp
    Patent number: 6097137
    Abstract: An electrodeless discharge lamp comprises a sealed discharge vessel containing a fill capable of sustaining a discharge when suitably energized, and circuitry for energizing a solenoid to produce an RF electromagnetic field in the vessel to energize the fill. A light transmissive, inherently conductive, polymer layer is provided on the exterior of the discharge vessel for confining the RF field within the lamp. An outer, insulating layer may also be provided over the conductive layer.
    Type: Grant
    Filed: February 12, 1997
    Date of Patent: August 1, 2000
    Assignee: General Electric Company
    Inventors: Graham M. Forsdyke, Stuart A. Mucklejohn, Mahamed H. Girach
  • Controlling the transmission of light from light sources
    Patent number: 5994840
    Abstract: The envelope (6) of a light source is at least partly coated with electrochromic material (20), sandwiched between two conductive layers (21,22). A voltage applied to the electrochromic material by way of the conductive layers varies the intensity and/or color of the light from the source.
    Type: Grant
    Filed: February 12, 1997
    Date of Patent: November 30, 1999
    Assignee: General Electric Company
    Inventors: Graham M. Forsdyke, Stuart A. Mucklejohn