(1) USP4,445,061
Wide Air Gap Permanent Magnet
Patented: April 24, 1984
Inventor: John T. Jackson, Jr.
Assignee: JR
(2) USP5,668,533
High Security Balanced-Type Magnetically-Actuated Proximity Switch System
Patented: September 16, 1997
Inventor: John T. Jackson, Jr.
Assignee: Securitron
(3) “The Jackson High Security Switch and Radio Frequency System”, Jackson, John Thaddius, Jr., University
of Nevada thesis, copyright 1997 by Jackson, John Thaddius, Jr., UMI Number: 1389436
(4) USP5,821,870
Monitored Security Switch Assembly
Patented: October 13, 1998
Inventor: John T. Jackson, Jr.
Assignee: JR
(5) USP5,874,878
Patented: February 23, 1999
Inventor: John T. Jackson, Jr.
Assignee: JR
(6) USP5,877,664
Magnetic Proximity Switch System
Patented: March 2, 1999
Inventor: John T. Jackson, Jr.
Assignee: JR
(7) USP5,929,731
Balanced Magnetic Proximity Switch Assembly
Patented: July 27, 1999
Inventor: John T. Jackson, Jr.
Assignee: JR
(8)"Trivial Defeat of a Balanced Magnetic Switch",
Wrote by John T. Jackson, Jr.,
The Journal of Physical Security 5(1), 1-11 (2011), http://jps.anl.gov/issues.html
(9) 3D Balanced High SecurityMagnetometer Systems
Introduced: December, 2011
Technology: Proprietary, JR and Toptech Magnetics
Description: The 3D Balanced High Security Magnetometer Systems, is the only known intelligent 3D
Magnetometer security intergrated device. The complex shape of the magnetic field surrounding
the sensors and REM actuator is analyzed by advanced proprietary algorithms to detect
defeat attempts. Any disturbances in its field of view generate an alarm state.
