Patents Assigned to Andover Monitoring Systems, Inc.
  • Time-temperature monitor and recording device and method for using the same
    Patent number: 5662419
    Abstract: A time-temperature monitor is provided that is adapted for indicating the amount of accumulated time during which the ambient temperature adjacent to the monitor is above a predetermined temperature. The time-temperature monitor comprises a viscous, non-Newtonian fluid biased within a flow path defining element, with the rate of flow therethrough being regulated by a constricting orifice disposed in a nozzle that is positioned in fluid communication with the flow path defining element.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: September 2, 1997
    Assignee: Andover Monitoring Systems, Inc.
    Inventor: David J. Lamagna