Patents by Inventor Christopher Michael Barnes

Christopher Michael Barnes 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).

  • Methods and systems of monitoring traffic flow
    Patent number: 6177886
    Abstract: A method of monitoring traffic flow comprises reading registration plates of the vehicles of a multiplicity of series of vehicles passing respective locations on a road network, if necessary selecting samples of readings from the readings relating to the vehicles of the series, and determining whether readings of the samples are deemed to contain matching readings. The samples are used as probes or targets to measure average journey times which are compared with reference journey times. The selecting of the samples at the respective reading locations is performed according to an algorithm common to all of the locations.
    Type: Grant
    Filed: October 12, 1999
    Date of Patent: January 23, 2001
    Assignee: Trafficmaster PLC
    Inventors: Peter Eric Billington, Christopher Michael Barnes, Jonathan Paul Wakefield