Patents by Inventor W. Clayton Collier

W. Clayton Collier 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 merging multiple road map databases
    Patent number: 6564224
    Abstract: A method and apparatus for combining two dissimilar road map databases of a given geographic region are provided. The road map database differ in degree of coverage or accuracy of coverage, or both, of the geographic region. Each database includes data defining a plurality of roads. A first set of loops is defined from roads represented in a first of the two road map databases. For each of the first set of loops, a corresponding loop is identified from roads represented in a second of the two road map databases, to define a second set of loops. Each loop of the second set of loops may include one or more links, and each link represents a portion of a road represented in the second road map database. A set of output loops corresponding to the first set of loops is generated to form an output road map database.
    Type: Grant
    Filed: March 30, 2000
    Date of Patent: May 13, 2003
    Assignee: Kivera, Inc.
    Inventors: Xiaoyi Wu, W. Clayton Collier, Rajiv K. Synghal, James Whitaker