Patents by Inventor Sean M. FitzPatrick

Sean M. FitzPatrick 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).

  • Schmitt trigger device with disable
    Patent number: 6624678
    Abstract: Described is a Schmitt trigger cell that can be disabled under conditions of unknown gate voltages (e.g., floating or toggling input) such that the core is isolated from the Schmitt trigger input. This is accomplished by circuitry that disables current flow through those transistors whose gate voltages are unknown during such conditions and that forces a known output onto the output terminal.
    Type: Grant
    Filed: October 9, 2002
    Date of Patent: September 23, 2003
    Assignee: Analog Devices, Inc.
    Inventors: Frederic Boutaud, Sean M. FitzPatrick, Paul D. Krivacek
  • Method and an apparatus to actively sink current in an integrated circuit with a floating I/O supply voltage
    Patent number: 6624682
    Abstract: Described is an apparatus and a method for pulling an integrated circuit I/O pad to a known state and providing a current path between the pad and a source of potential during periods when an I/O voltage is likely to be floating. At least one I/O transistor coupled between the I/O pad and a source of potential is provided. Also provided is a combinatorial circuit connected to the I/O transistor to turn on the I/O transistor during periods that the I/O voltage is likely to be floating.
    Type: Grant
    Filed: October 9, 2002
    Date of Patent: September 23, 2003
    Assignee: Analog Devices, Inc.
    Inventors: Frederic Boutaud, Sean M. FitzPatrick, Paul D. Krivacek
  • Coil volumetric and surface defect detection system
    Patent number: 5866820
    Abstract: A EMAT inspection system is utiliized on sheet metal prior to it being formed or rolled to identify surface defects and sub-surface defects such as pencil pipe inclusions by using ultrasonic Lamb waves with the results being displayed on a remote screen of a display and control system which also records the inspection results and controls the EMAT system.
    Type: Grant
    Filed: September 20, 1996
    Date of Patent: February 2, 1999
    Inventors: Kenneth R. Camplin, Dennis D. Lang, Darrel P. Kohlhorst, Daniel P. Geier, Gary D. Novak, Sean M. Fitzpatrick, Glenn E. McNeelege, Bradley E. Cox, Richard C. Brewer, Thomas A. Artman, Mark A. Hooker
  • Automated mill roll inspection system
    Patent number: 5763786
    Abstract: An EMAT inspection system is utilized on a mill roll to identify surface and sub-surface defects such as firecracks in steel mill rolls with the results being displayed on a remote screen of a display and control system which also records the inspection results and controls the EMAT system.
    Type: Grant
    Filed: September 18, 1996
    Date of Patent: June 9, 1998
    Assignee: The Babcock & Wilcox Company
    Inventors: Kenneth R. Camplin, Dennis D. Lang, Darrel P. Kohlhorst, Daniel P. Geier, Sean M. Fitzpatrick, Bradley E. Cox, Richard C. Brewer, Thomas A. Artman, Daniel T. MacLauchlin