Patents Assigned to Introl Design, Inc.
  • Sensor for rail switch position
    Patent number: 6899303
    Abstract: Method and apparatus for detection of the presence of a train wheel on a train track that overcomes problems associated with previously known detectors. The invention includes a method for detecting the presence of a train wheel on a train track.
    Type: Grant
    Filed: November 25, 2003
    Date of Patent: May 31, 2005
    Assignee: Introl Design, Inc.
    Inventor: Alireza Shams
  • Sensor for railcar wheels
    Patent number: 6663053
    Abstract: Method and apparatus for detection of the presence of a train wheel on a train track that overcomes problems associated with previously known detectors. The invention includes a method for detecting the presence of a train wheel on a train track.
    Type: Grant
    Filed: August 30, 2002
    Date of Patent: December 16, 2003
    Assignee: Introl Design, Inc.
    Inventor: Alireza Shams