Patents by Inventor Geoffrey Charles Allen

Geoffrey Charles Allen 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).

  • Laser devices
    Patent number: 6639931
    Abstract: A vertical cavity surface emitting laser device (10) has a discontinuity (11) formed within the body of the device. When the device is in use, the direction of polarization of light emitted from the device is substantially aligned with a boundary of the discontinuity.
    Type: Grant
    Filed: March 29, 2000
    Date of Patent: October 28, 2003
    Assignee: University of Bristol
    Inventors: Philip Dowd, Ian Hugh White, Richard Vincent Penty, Peter John Heard, Geoffrey Charles Allen, Michael Renne Ty Tan