Patents by Inventor James Kilfeather

James Kilfeather 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).

  • System and method to reduce PPP filter convergence time using LEO frequency band signals
    Patent number: 11740364
    Abstract: A method of enhancing the accuracy of a navigation system which includes a GNSS receiver. The method includes receiving navigation signals from at least one GNSS constellation and a LEO constellation. Position estimates will be made through implementation of a filter using successive readings of pseudoranges and carrier-phase measurements from the GNSS constellation and carrier-phase measurements from the LEO constellation.
    Type: Grant
    Filed: January 7, 2022
    Date of Patent: August 29, 2023
    Assignee: Globalstar, Inc.
    Inventors: James Kilfeather, Samuel Phillip Pullen
  • System and method to reduce PPP filter convergence time using LEO frequency band signals
    Patent number: 11226416
    Abstract: A method of enhancing the accuracy of a navigation system which includes a GNSS receiver. The method includes receiving navigation signals from at least one GNSS constellation and a LEO constellation. Position estimates will be made through implementation of a filter using successive readings of pseudoranges and carrier-phase measurements from the GNSS constellation and carrier-phase measurements from the LEO constellation.
    Type: Grant
    Filed: September 25, 2019
    Date of Patent: January 18, 2022
    Assignee: Globalstar, Inc.
    Inventors: Samuel Phillip Pullen, James Kilfeather
  • System and method for dual-mode location determination
    Publication number: 20050261833
    Abstract: A geographic tracking system with minimal power and size required at the mobile terminal collects observation data at the mobile terminal, forwards the data to a processor, which calculates the position. The mobile terminal needs only to gather a few milliseconds of observation data, and to relay this observation data to the processor. In one embodiment, the observation data is communicated to the processor using either a satellite communication network or through a mobile telephone network.
    Type: Application
    Filed: January 28, 2005
    Publication date: November 24, 2005
    Inventors: Jay Brosius, James Kilfeather, Richard Burtner