Patents by Inventor Toan X. Vu

Toan X. Vu 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).

  • Barometric floor level indicator
    Patent number: 7162368
    Abstract: The invention relates to a device, system, and method for providing a multi-mode navigation device. In a first mode of operation, the navigation device provides position information based on a radio frequency navigation signals. If radio signals become unavailable, the navigation device enters a second mode of operation. In the second mode of operation the navigation device stores the most recent elevation and associates it with a reference elevation, the reference elevation is associated with an entry floor. The difference between a current elevation and the reference elevation is determined and this difference is divided by a floor height to obtain a floor number. The navigation device provides the floor number while reliable global position information is unavailable.
    Type: Grant
    Filed: November 9, 2004
    Date of Patent: January 9, 2007
    Assignee: Honeywell International Inc.
    Inventors: Robert W. Levi, Toan X. Vu