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| Number | Title | Issue Date |
| 8125335 | Metal detector gate comprising refined indicator means The present invention relates to a metal detector gate comprising two uprights (12, 14) housing sensors forming a metal mass detector, particularly transmitter/receiver coils (20, 22), associated with a power supply and processing module (30), a... | 02/28/2012 |
| 8106770 | Metal detector with improved magnetic soil response cancellation A method for detecting a target in a soil, including the step of generating a transmit signal, the transmit signal including at least three different frequency components, a relatively high frequency component, a relatively medium frequency component and a relativel... | 01/31/2012 |
| 8102260 | Methods, systems and devices for detecting threatening objects and for classifying magnetic data A method for detecting threatening objects in a security screening system. The method includes a step of classifying unique features of magnetic data as representing a threatening object. Another step includes acquiring magnetic data. Another step includes determini... | 01/24/2012 |
| 7876219 | Message leaving system and method for digital photo frame A message leaving system for digital photo frame (DPF) is provided. The message leaving system includes a message recording unit configured to record a message in the DPF, a detecting sensor initiated by information sent from the message recording unit to detect hum... | 01/25/2011 |
| 7868758 | Passenger screening system and method A passenger screening system including a first gradiometer, and a second gradiometer disposed adjacent the first gradiometer. The first and second gradiometers are each configured to operate at a first frequency and a second frequency to facilitate detecting the pre... | 01/11/2011 |
| 7834761 | H-bridge activator/deactivator and method for activating/deactivating EAS tags A method and an apparatus and system are disclosed for activating, deactivating or reactivating an electronic article surveillance (EAS) label by way of a coil antenna in an H-bridge circuit which generates from the antenna: a positive increasing magnetic field; a p... | 11/16/2010 |
| 7812722 | Dual orientation metal scanner An ergonomically designed metal detector is provided. The metal detector allows for operation of the metal detector between two modes of operation while maintaining an operator's hand position relative to the surface. ... | 10/12/2010 |
| 7652572 | Methods, systems and devices for detecting and locating ferromagnetic objects Methods for detecting and locating ferromagnetic objects in a security screening system. One method includes a step of acquiring magnetic data that includes magnetic field gradients detected during a period of time. Another step includes representing the magnetic da... | 01/26/2010 |
| 7535354 | Proxemics sensor A sensor having a crystal having a first face and a second face, the first face comprising a prong, wherein the sensor is adapted to track movement of an object in a medium other than vacuum and the prong has a frequency of vibration that substantially matched a fre... | 05/19/2009 |
| 7495555 | Magnetic field sensing for tamper identification The present technology involves a method and apparatus for detecting and reporting magnetic fields in the proximity of a utility meter as an approach to determining tampering of such meter. The sensitivity level of the magnetic field sensors may be adjustable allowi... | 02/24/2009 |
| 7468664 | Enclosure tamper detection and protection A tamper detecting enclosure arrangement for enclosures containing an interior space in which a protected item is positioned having a magnetoresistive sensing memory storage cell positioned in or near the protected item in the enclosure having a two state offset mag... | 12/23/2008 |
| 7432827 | Device for activating inductive loop sensor of a traffic light control system A system and method for activating vehicle sensors which are based on inductive loops. A voltage controlled oscillator is scanned throughout the required frequency range while a balanced mixer, low-pass filter, and detector are arranged to show the presence of a sig... | 10/07/2008 |
| 7429915 | System and method for detecting unauthorized access to electronic equipment or components An improved system and method for protecting sensitive electronic equipment or components against unauthorized access, by detecting and also reacting to unauthorized intrusions into the enclosures for the sensitive electronic equipment or components is disclosed. Fo... | 09/30/2008 |
| 7423545 | Failed filter arrest indicator and method for use in multiple arrester location The present invention is a technique for locating and identifying a failed filter/arrester in an underground conveyance such as a fiber optic cable. A sensor is installed in the filter/arrester housing to sense grounding of a cable locating frequency. The sensor wil... | 09/09/2008 |
| 7414530 | Monitoring circuit for a door The present application describes a monitoring circuit for an aircraft. The monitoring circuit comprises an inductive system, wherein the inductive system comprises a multitude of air core inductors and capacitors. Depending on the distance between a target and the ... | 08/19/2008 |
| 7414400 | Detection of ferromagnetic objects approaching a magnet An apparatus for detecting a potentially dangerous ferromagnetic object carried inadvertently by a person approaching the magnet of a magnetic resonance imaging system (14) uses the fringe field (16) of the magnet and provides guide members (11)... | 08/19/2008 |
| 7408462 | Control of monitored zone The invention relates to a method for the control of a monitored zone, in particular at transport devices for objects, wherein the monitored zone is scanned by means of at least one spatially resolving sensor, in particular a laser scanner and/or a camera system, th... | 08/05/2008 |
| 7408461 | Metal detection system and method This application describes a system for contraband and weapons detection. The system comprises a coplanar sensor array, electronic drive circuitry, a data acquisition circuit, a video frame grabber, a video camera, and a computer control unit with a control module i... | 08/05/2008 |
| 7388370 | Magnetic crash sensor At least one time-varying signal is applied to a plurality of coil elements in cooperative relationship with and spanning different portions of a vehicle. The coil elements generate an associated plurality of magnetic field components that interact with the vehicle.... | 06/17/2008 |
| 7382266 | Surface tracker A surface tracker includes a tubular marker body having an interior electronic marker and a visual indicator attached to an upper end of the marker body which extends away from the marker body. When deployed, the marker body is mostly underground and the visual indi... | 06/03/2008 |
| 7348890 | Pest control techniques A pest control system (20) includes pest control devices (110) installed about an area or building (22). These devices (110) each include a bait member and a communication circuit. The communication circuit may be in the form of a passive... | 03/25/2008 |
| 7347372 | System and method of notifying an operator of a result of attempting to read a product label A system for notifying an operator of a result of attempting to read a number of product labels on an item which produces only a single good read indication or bad read indication. The system includes a good read indicator, a bad read indicator, and control circuitr... | 03/25/2008 |
| 7334735 | Card for interaction with a computer A smart card comprising: a memory for storing information; at least one transmitting or receiving antenna; and a low frequency circuit, for handling information associated with said antenna and said memory, which information is modulated at a modulation frequency of... | 02/26/2008 |
| 7324014 | Inductive loop detector with automatic frequency change A system and method is disclosed to the elimination of cross talk between inductive loop detector units in a security system. The system includes appropriate devices for assigning different operational frequencies of each loop detector circuit to avoid cross talk. I... | 01/29/2008 |
| 7322522 | Identification function paper and identification card The present invention provides identification functional paper which allows secure measurement of a change in signal caused by a magnetic material and excels in waveform reproducibility when measuring a single specimen two or more times, and an identification card i... | 01/29/2008 |
| 7319321 | Magnetic screening system A magnetic screening system including an arrangement of gradiometers each including at least three magnetometers, a gradiometer processor in communication with the magnetometers that scales outputs from the magnetometers with unequal weights and combines the scaled ... | 01/15/2008 |
| 7317387 | Method and apparatus for increased container security One embodiment includes a support configured to resiliently and removably grip a door hinge portion, with circuitry coupled to a wireless communication portion on an exterior side thereof. A different embodiment has a wireless communication portion with two antennas... | 01/08/2008 |
| 7315248 | Radio frequency identification tags for use on metal or other conductive objects A radio frequency identification (“RFID”) tags that are useful on metal or other conductive surface and to methods for manufacturing the same. In one embodiment, the radio frequency identification tag includes: a substrate including a first major surface and a s... | 01/01/2008 |
| 7300535 | Magnetically readable card and a method of making a magnetically readable card The present invention includes a process for making a magnetically readable card. The process includes providing a polymeric extrudable substrate material and one or more magnetic strips. The substrate is extruded in an extruder. The magnetic strips are aligned and ... | 11/27/2007 |
| 7298260 | Tesla coil security system A tesla coil security system for proactively and effectively deterring unauthorized individuals from entering an opening in a non-lethal manner. The tesla coil security system includes a tesla coil, a length of wire electrically connected to the tesla coil for surro... | 11/20/2007 |
| 7296683 | Ferrous metal detector with alarm An electronic ferrous metal detector with an alarm includes a non-ferrous core positioned circumferentially about an opening in an object, such as a hole in a garbage can lid. A pick-up coil having a sufficient number of windings is wound about the non-ferrous core ... | 11/20/2007 |
| 7298261 | Proximity sensor An operation section 2 is provided to a proximity sensor including: a detection section having an oscillation circuit 10; and an amplification section 2 having a function detecting a metal body using an oscillation amplitude of the oscillation c... | 11/20/2007 |
| 7295107 | Ferromagnetic detection pillar A ferromagnetic detection pillar having one or more applied magnetic field sources and one or more magnetic field sensors, with the magnets and sensors arranged and adapted to detect a ferromagnetic threat object on one side of the pillar. A detection device, such a... | 11/13/2007 |
| 7289040 | Device for detecting vehicles A magnetic field sensor is provided alongside a roadway in order to detect vehicles. A permanent magnet is installed in the roadway at such a distance from the magnetic field sensor that the magnetic field of the permanent magnet is stronger than the geomagnetic fie... | 10/30/2007 |
| 7281432 | Displacement sensor with an excitation coil and a detection coil To be able to detect a displacement amount of a moving object by a resolution of from micrometer to nanometer by a simple structure. An excitation coil 23 and a detection coil 25 are arranged to align and a magnetic body probe 27 in a con... | 10/16/2007 |
| 7265551 | Metal detector, in particular mine detector A mine detector has a search head with a transmitting unit for the transmission of signal sequences into the ground, and a metal detection unit. A distance measurement sensor is arranged on the search head for determination of the current geometric distance of the s... | 09/04/2007 |
| 7257971 | Case with internal lock A lockable storage case includes a top cover pivotably coupled to a bottom cover through a spine. The top cover includes loops or an upper lock receiving member and a lower lock receiving member defining a top cover lock insertion path. The bottom cover includes loo... | 08/21/2007 |
| 7253600 | Constant slope ramp circuits for sample-data circuits A sample-data analog circuit includes a level-crossing detector. The level-crossing detector controls sampling switches to provide a precise sample of the output voltage when the level-crossing detector senses the predetermined level crossing of the input signal. A ... | 08/07/2007 |
| 7250865 | Object tracking system with non-contact object detection and identification An object tracking system is provided for tracking the removal of objects from a location and the replacement of the objects at the location. The system includes a radio frequency identification (RFID) tag attached to each of the objects to be tracked and each tag h... | 07/31/2007 |
| 7250853 | Surveillance system A surveillance system is provided. The system includes at least one target detection sensor, a plurality of adjustable identification sensors and a system controller. The syste controller is coupled to the at least one target detection sensor and the plurality of ad... | 07/31/2007 |
