Patents by Inventor John Darby Alt

John Darby Alt 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).

  • Tram coordinating method and apparatus
    Patent number: 5676059
    Abstract: A method and apparatus for coordinating the movement of a plurality of oppositely directed trams operating generally simultaneously along a single, dedicated lane, including a plurality of stop-boarding areas, a plurality of corresponding by-pass lanes, sensors along the lane to sense the location of the trams, a central processor to compare the location of the trams and calculate signals to pairs of oppositely moving trams such that they will adjust their speeds to arrive at a common stop-boarding area at substantially the same time.
    Type: Grant
    Filed: November 29, 1996
    Date of Patent: October 14, 1997
    Inventor: John Darby Alt