Patents by Inventor Cris W. Johnson

Cris W. Johnson 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).

  • Integrated navigation system
    Patent number: 6377892
    Abstract: An integrated navigation system includes a prime mission navigation system (e.g., a military code GPS-based flight management system), a second navigation system (e.g., a civil code GPS-based navigation system) and an integrity check system. The first navigation system receives first positioning signals and generates a first navigation solution based on the first positioning signals. The second navigation system receives second positioning signals and generates a second navigation solution based on the second positioning signals. The integrity check system receives the first navigation solution and the second navigation solution, compares the first navigation solution to the second navigation solution, and generates a validity signal based on the comparison.
    Type: Grant
    Filed: May 2, 2000
    Date of Patent: April 23, 2002
    Assignee: Rockwell Collins, Inc.
    Inventors: Cris W. Johnson, Kenneth W. McElreath