Patents Assigned to Princeton Synergetics, Inc.
  • Patent number: 4711994
    Abstract: A method, and its associated system, for maintaining a close and accurate security surveillance of both the passengers and their baggage on a public conveyance, to insure that, before departure, baggage is not loaded aboard the conveyance without a prior, positive indication that the owner or the passenger has, in fact, been properly boarded.
    Type: Grant
    Filed: January 17, 1986
    Date of Patent: December 8, 1987
    Assignee: Princeton Synergetics, Inc.
    Inventor: Joel S. Greenberg