Patents by Inventor Christopher Simon Burrell

Christopher Simon Burrell 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).

  • Method and apparatus for distance measurement
    Patent number: 6404703
    Abstract: A method and apparatus for distance measurement is disclosed in which first and second signals having different propagation speeds are transmitted between a transmitter (2) at a first location and a receiver (3) at a second location. The distance between the first and second locations is determined from the difference in propagation time between the first and second signals.
    Type: Grant
    Filed: July 6, 1999
    Date of Patent: June 11, 2002
    Assignee: The Guide Dogs for the Blind Association
    Inventor: Christopher Simon Burrell