Patents by Inventor Jeffrey Koval

Jeffrey Koval 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 determining whether a transportation track is occupied
    Patent number: 9290190
    Abstract: A method for determining whether a defined section of a transportation track is occupied is described. The method includes inducing an audio frequency (AF) signal at a first position on the transportation track and receiving the AF signal at a second position on the transportation track. The defined section of the transportation track is located between the first position and the second position on the transportation track. The method further includes measuring a strength of the AF signal received as a function of time at the second position, and identifying an inflection point of the recorded AF signal strength. The inflection point indicates at least one of a rail vehicle entering the defined section of the transportation track and the rail vehicle exiting the defined section of the transportation track. The method further includes determining an occupancy of the defined section of the transportation track, based on the inflection point.
    Type: Grant
    Filed: July 31, 2008
    Date of Patent: March 22, 2016
    Inventor: Jeffrey Koval
  • SYSTEMS AND METHODS FOR DETERMINING WHETHER A TRANSPORTATION TRACK IS OCCUPIED
    Publication number: 20100025545
    Abstract: A method for determining whether a defined section of a transportation track is occupied is described. The method includes inducing an audio frequency (AF) signal at a first position on the transportation track and receiving the AF signal at a second position on the transportation track. The defined section of the transportation track is located between the first position and the second position on the transportation track. The method further includes measuring a strength of the AF signal received as a function of time at the second position, and identifying an inflection point of the recorded AF signal strength. The inflection point indicates at least one of a rail vehicle entering the defined section of the transportation track and the rail vehicle exiting the defined section of the transportation track. The method further includes determining an occupancy of the defined section of the transportation track, based on the inflection point.
    Type: Application
    Filed: July 31, 2008
    Publication date: February 4, 2010
    Inventor: Jeffrey Koval