Patents Represented by Attorney DLP Piper US LLP

Find this attorney in the Justia Lawyer Directory

  • Train control system and method of controlling a train or trains
    Patent number: 7200471
    Abstract: A train control system and method for ensuring that a train cannot be moved from a section of track not on a main line to a section of track on the main line until both a movement authority for the section of main line track and a circulation authority for the section of track not on the main line are received.
    Type: Grant
    Filed: July 11, 2006
    Date of Patent: April 3, 2007
    Assignee: Quantum Engineering, Inc.
    Inventors: Mark Edward Kane, James Francis Shockley, Harrison Thomas Hickenlooper