Patents by Inventor Douglas A. Cummins

Douglas A. Cummins 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).

  • Systems and methods for locating a target in a GPS-denied environment
    Patent number: 9606219
    Abstract: A system for locating an object in a GPS-denied environment includes first and second stationary nodes of a network and an object out of synchronization with a common time base of the network. The system includes one or more processors that are configured to estimate distances between the first stationary node and the object and a distance between the second stationary node and the object by comparing time-stamps of messages relayed between the object and the nodes. A position of the object can then be trilaterated using a location of each of the first and second stationary nodes and the measured distances between the object and each of the first and second stationary nodes.
    Type: Grant
    Filed: August 2, 2010
    Date of Patent: March 28, 2017
    Assignee: Progeny Systems Corporation
    Inventors: Ronald G. Murdock, John D. Mackay, Douglas A. Cummins
  • SYSTEMS AND METHODS FOR LOCATING A TARGET IN A GPS-DENIED ENVIRONMENT
    Publication number: 20120026041
    Abstract: A system for locating an object in a GPS-denied environment includes first and second stationary nodes of a network and an object out of synchronization with a common time base of the network. The system includes one or more processors that are configured to estimate distances between the first stationary node and the object and a distance between the second stationary node and the object by comparing time-stamps of messages relayed between the object and the nodes. A position of the object can then be trilaterated using a location of each of the first and second stationary nodes and the measured distances between the object and each of the first and second stationary nodes.
    Type: Application
    Filed: August 2, 2010
    Publication date: February 2, 2012
    Applicant: Progeny Systems Corporation
    Inventors: Ronald G. Murdock, John D. Mackay, Douglas A. Cummins