Patents by Inventor Edward J. Callaghan

Edward J. Callaghan 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).

  • Theft resistant circuit assembly
    Patent number: 5847650
    Abstract: Printed circuit boards and integrated circuit assemblies have security markers formed thereon by deposition techniques or affixed thereto, either directly or by prior encasement of the markers in a resin prior to such affixation.
    Type: Grant
    Filed: October 4, 1996
    Date of Patent: December 8, 1998
    Assignee: Knogo North America Inc.
    Inventors: Peter Y. Zhou, Thomas A. Nicolette, Edward J. Callaghan, Paul F. McNamara
  • Surveillance marker and method of making same
    Patent number: 5401584
    Abstract: A deactivatable electronic theft detection marker is made from a strip or ribbon of high magnetic permeability strip or ribbon and then high magnetic coercivity material is deposited on the strip or ribbon by electroplating.
    Type: Grant
    Filed: September 10, 1993
    Date of Patent: March 28, 1995
    Assignee: Knogo Corporation
    Inventors: Arthur J. Minasy, Peter Y. Zhou, Thomas P. Solaski, Edward J. Callaghan