Patents by Inventor Randall Cayford

Randall Cayford 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 system for electronically determining dynamic traffic information
    Patent number: 7269507
    Abstract: A method of and system for determining a path traveled by a vehicle in a road network having a plurality of road segments connected into a plurality of paths that includes obtaining a current location measurement having an accuracy range, determining the road segments located within this accuracy range of the current location measurement to form a set of current possible positions for the vehicle, retrieving a set of stored possible paths for the vehicle, generating a new set of possible paths based on the set of current possible positions and the set of stored possible paths, and storing the new set of possible paths as the set of stored possible paths.
    Type: Grant
    Filed: May 17, 2002
    Date of Patent: September 11, 2007
    Assignee: The Regents of the University of California
    Inventor: Randall Cayford
  • Method and system for electronically determining dynamic traffic information
    Publication number: 20040220728
    Abstract: A method of and system for determining a path traveled by a vehicle in a road network having a plurality of road segments connected into a plurality of paths that includes obtaining a current location measurement having an accuracy range, determining the road segments located within this accuracy range of the current location measurement to form a set of current possible positions for the vehicle, retrieving a set of stored possible paths for the vehicle, generating a new set of possible paths based on the set of current possible positions and the set of stored possible paths, and storing the new set of possible paths as the set of stored possible paths.
    Type: Application
    Filed: November 21, 2003
    Publication date: November 4, 2004
    Inventor: Randall Cayford
  • Method and system for electronically determining dynamic traffic information
    Patent number: 6560532
    Abstract: A method of and system for determining a path traveled by a vehicle in a road network having a plurality of road segments connected into a plurality of paths that includes obtaining a current location measurement having an accuracy range, determining the road segments located within this accuracy range of the current location measurement to form a set of current possible positions for the vehicle, retrieving a set of stored possible paths for the vehicle, generating a new set of possible paths based on the set of current possible positions and the set of stored possible paths, and storing the new set of possible paths as the set of stored possible paths.
    Type: Grant
    Filed: January 31, 2002
    Date of Patent: May 6, 2003
    Assignee: Regents of the University of California, The
    Inventor: Randall Cayford
  • Method and system for electronically determining dynamic traffic information
    Publication number: 20020177947
    Abstract: A method of and system for determining a path traveled by a vehicle in a road network having a plurality of road segments connected into a plurality of paths that includes obtaining a current location measurement having an accuracy range, determining the road segments located within this accuracy range of the current location measurement to form a set of current possible positions for the vehicle, retrieving a set of stored possible paths for the vehicle, generating a new set of possible paths based on the set of current possible positions and the set of stored possible paths, and storing the new set of possible paths as the set of stored possible paths.
    Type: Application
    Filed: January 31, 2002
    Publication date: November 28, 2002
    Inventor: Randall Cayford