Patents by Inventor Mark Southgate Walter

Mark Southgate Walter 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).

  • Illuminated road sign
    Patent number: 7406787
    Abstract: An illuminated sign (2) comprises a sign panel (5) and at least two elements of electroluminescent material (14, 15) each element being individually selectively actuable and arranged to emit light so as to illuminate the sign panel. Each element may be used as a photodetector or a photo-emitter. A retro-reflective strip (10) may provide additional visibility.
    Type: Grant
    Filed: July 5, 2002
    Date of Patent: August 5, 2008
    Inventors: Stephan Trevor Smith, Mark Southgate Walter, Mike Bodeckyj
  • Illuminated road sign
    Publication number: 20040244246
    Abstract: An illuminated sign (2) comprises a sign panel (5) and at least two elements of electroluminescent material (14, 15) each element being individually selectively actuable and arranged to emit light so as to illuminate the sign panel. Each element may be used as a photodetector or a photo-emitter. A retro-reflective strip (10) may provide additional visibility.
    Type: Application
    Filed: July 16, 2004
    Publication date: December 9, 2004
    Inventors: Stephan Trevor Smith, Mark Southgate Walter, Mike Bodeckyj