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Class Information
Number: 340/551
Name: Communications: electrical > Condition responsive indicating system > Specific condition > Intrusion detection > Disturbance of magnetic field
Description: Subject matter responsive to the change of a magnetic field caused by the presence or motion of an intruder.










Patents under this class:
1 2 3 4 5 6 7 8 9 10 11

Patent Number Title Of Patent Date Issued
8710826 Systems and methods for sensing external magnetic fields in implantable medical devices Apr. 29, 2014
8564410 Shipping container security process Oct. 22, 2013
8537009 Container security devices, systems, and method Sep. 17, 2013
8446277 Proximity warning system with silent zones May. 21, 2013
8434158 Systems and methods for detecting and thwarting unauthorized access and hostile attacks on secured systems Apr. 30, 2013
8416076 Magnetic proximity sensor system and associated methods of sensing a magnetic field Apr. 9, 2013
8378836 Magnetic field strength threshold alarm Feb. 19, 2013
8378819 Electrostatic occupant detection apparatus and method for detecting failure of the same Feb. 19, 2013
8368559 Network of traffic behavior-monitoring unattended ground sensors (NeTBUGS) Feb. 5, 2013
8354929 Intruder detector and classifier Jan. 15, 2013
8319640 Method for maintaining a shipping container manifest Nov. 27, 2012
8314714 Method and device for manual triggering Nov. 20, 2012
8314713 Method for monitoring the operation of a metal detection system and metal detection system Nov. 20, 2012
8237579 Reference signal synchronized to clock signal Aug. 7, 2012
8207857 Detection device Jun. 26, 2012
8193806 Object detecting apparatus Jun. 5, 2012
8138918 Intrusion detection and tracking system Mar. 20, 2012
8125335 Metal detector gate comprising refined indicator means Feb. 28, 2012
8120354 Self-calibrating magnetic field monitor Feb. 21, 2012
8106770 Metal detector with improved magnetic soil response cancellation Jan. 31, 2012
8102260 Methods, systems and devices for detecting threatening objects and for classifying magnetic data Jan. 24, 2012
8098157 Intruder deterrent lighting Jan. 17, 2012
8057871 Anti-theft label and its assembly method Nov. 15, 2011
8049489 Systems and methods for sensing external magnetic fields in implantable medical devices Nov. 1, 2011
7999700 System and apparatus for preventing theft from vehicles Aug. 16, 2011
7969312 Device and process for magnetic material detection in electronic article surveillance (EAS) electromagnetic systems Jun. 28, 2011
7961096 System and method for detection of EAS marker shielding Jun. 14, 2011
7948378 Tamperproof non-contact switch May. 24, 2011
7933559 RF test chamber Apr. 26, 2011
7907065 Device for activating inductive loop sensor of a traffic light control system Mar. 15, 2011
7902979 Directed energy beam virtual fence Mar. 8, 2011
7898248 Magnetic screening system and a network managing same Mar. 1, 2011
7880630 Security system for a boundary Feb. 1, 2011
7876219 Message leaving system and method for digital photo frame Jan. 25, 2011
7868758 Passenger screening system and method Jan. 11, 2011
7863891 Collision detection device which uses variation of an inductance of a coil Jan. 4, 2011
7834761 H-bridge activator/deactivator and method for activating/deactivating EAS tags Nov. 16, 2010
7812722 Dual orientation metal scanner Oct. 12, 2010
7784468 Surgical implement detection system Aug. 31, 2010
7759931 Device for measuring magnetic impedance Jul. 20, 2010
7750806 Magnetic security tag assembly Jul. 6, 2010
7724146 Magnetically releasable electronic article surveillance tag May. 25, 2010
7701337 Hybrid-technology metal detector Apr. 20, 2010
7696879 Ascertaining physical routing of cabling interconnects Apr. 13, 2010
7683779 Flatware detection apparatus Mar. 23, 2010
7667597 Method and apparatus using magnetic flux for container security Feb. 23, 2010
7667600 Methods and apparatus for security device removal detection Feb. 23, 2010
7663483 Methods and apparatus for security device portal sensing Feb. 16, 2010
7652572 Methods, systems and devices for detecting and locating ferromagnetic objects Jan. 26, 2010
7646302 Scooping device for container having an electromagnetic surveillance device Jan. 12, 2010

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