Patents by Inventor M. LaVarre Bushman

M. LaVarre Bushman 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).

  • Passive GSM-based self-locating device
    Patent number: 7363043
    Abstract: A self locating device that uses GSM signals associated with GSM digital telephone base stations to determine its current location. The device uses GSM common channel signals to determine observed time differences between a local base station and at least two additional base stations. It also uses the common channel signals to identify these base stations and to match the identifications to geographical locations. It further uses a geolocation algorithm to determine the location of the device relative to the base stations, and uses the geographic location data to determine the current geographic location of the device.
    Type: Grant
    Filed: May 16, 2002
    Date of Patent: April 22, 2008
    Assignee: Southwest Research Institute
    Inventors: Thomas H. Jaeckle, Richard L. Johnson, Michael A. Koets, M. LaVarre Bushman
  • Passive GSM-based self-locating device
    Publication number: 20020193941
    Abstract: A self locating device that uses GSM signals associated with GSM digital telephone base stations to determine its current location. The device uses GSM common channel signals to determine observed time differences between a local base station and at least two additional base stations. It also uses the common channel signals to identify these base stations and to match the identifications to geographical locations. It further uses a geolocation algorithm to determine the location of the device relative to the base stations, and uses the geographic location data to determine the current geographic location of the device.
    Type: Application
    Filed: May 16, 2002
    Publication date: December 19, 2002
    Applicant: Southwest Research Institute
    Inventors: Thomas H. Jaeckle, Richard L. Johnson, Michael A. Koets, M. LaVarre Bushman