EP2660788A1 - System und Verfahren zum Diebstahlschutz von Wertgegenstäden mittels elektromagnetischer Einschlusstechniken - Google Patents

System und Verfahren zum Diebstahlschutz von Wertgegenstäden mittels elektromagnetischer Einschlusstechniken Download PDF

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Publication number
EP2660788A1
EP2660788A1 EP12382164.7A EP12382164A EP2660788A1 EP 2660788 A1 EP2660788 A1 EP 2660788A1 EP 12382164 A EP12382164 A EP 12382164A EP 2660788 A1 EP2660788 A1 EP 2660788A1
Authority
EP
European Patent Office
Prior art keywords
asset
protection device
protection
uhf
decoupler
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP12382164.7A
Other languages
English (en)
French (fr)
Inventor
Pedro Díaz Aranda
Vicente Quilez Sánchez
José Manuel Mateos De La Cruz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Plettac Electronics Sistemas SA
Original Assignee
Plettac Electronics Sistemas SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Plettac Electronics Sistemas SA filed Critical Plettac Electronics Sistemas SA
Priority to EP12382164.7A priority Critical patent/EP2660788A1/de
Priority to PCT/ES2013/070270 priority patent/WO2013164508A1/es
Publication of EP2660788A1 publication Critical patent/EP2660788A1/de
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2405—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used
    • G08B13/2414—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used using inductive tags
    • G08B13/2417—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used using inductive tags having a radio frequency identification chip
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2428—Tag details
    • G08B13/2434—Tag housing and attachment details
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2465—Aspects related to the EAS system, e.g. system components other than tags
    • G08B13/2468—Antenna in system and the related signal processing
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2465—Aspects related to the EAS system, e.g. system components other than tags
    • G08B13/2488—Timing issues, e.g. synchronising measures to avoid signal collision, with multiple emitters or a single emitter and receiver

Definitions

  • the present invention relates, in the first place, to an anti-theft asset protection system based on electromagnetic confinement techniques for the assets to be protected. Secondly, the present invention relates to an anti-theft asset protection method also based on electromagnetic confinement techniques for the asset to be protected.
  • the fields of application of the method and system object of the present invention are, in principle, any scenario in which protection of assets "subject to manipulation", such as in commercial enclosures, libraries, offices, hospitals, stores, etc., regardless of their dimensions and geometries and applied both outdoors and indoors, is of interest.
  • shop customers expect a greater degree of freedom when examining and trying out a particular article to see whether it is satisfactory before purchase, and therefore, they require having greater freedom to move with the article inside the sales department without being disturbed.
  • especially valuable objects are placed inside cabinets or are subject to severe mobility restrictions, pinned by electric cables, metal strips and chains, which supposes important restrictions in the customers' handling of the articles.
  • the proposed system and method propose the development of an asset protection architecture based on electromagnetic confinement techniques that allow detecting, without the need to establish any kind of physical barrier, any protected object intended to be taken out of the previously defined confinement area.
  • Document US2010277322A1 describes an asset theft detection system and method using an electromagnetic field generator, fixing at least one safety tag on the asset to be protected within the generated field.
  • the geographical area radioelectrically covered by the field generator is local and placed in strategic locations.
  • the electromagnetic field generator emits periodic pulses at a particular frequency, which are received by the tags. If the tags do not receive the pulses, they would trigger an alarm that they integrate, warning about the possible theft.
  • Document US20110121973 A1 considered to be the closest to the state of the art of the present application, describes an asset protection system that generate an electromagnetic confinement area within which certain assets to be protected are located.
  • the confinement area is generated by means of radiant elements and the assets are protected by means of their coupling to a tag that is configured to receive a signal emitted periodically from the radiant elements. If the tag does not detect the signal originating from the radiant elements, it would emit a local sound alarm and a radiofrequency alarm signal to certain elements, which, in turn, are connected to remote sound alarms, which would also be triggered.
  • the anti-theft asset protection system and method based on the electromagnetic confinement of the assets to be protected object of the present application intends to provide a novel solution to this problem, by combining protection and freedom of manipulation in the handling of the articles on display.
  • a first object of the present invention is an anti-theft asset protection system by means of electromagnetic techniques, comprising at least one asset to be protected.
  • This system comprises at least the following elements:
  • the number of radiant elements used for the creation of a single confinement space will depend on the volume of the space intended to be confined and the radiated power of the VLF/LF transceivers of the radiant elements.
  • the number of protection devices will depend on the amount of assets intended to be protected, since each asset should have at least one protection device fixed therein.
  • the radiant elements comprise at least one modular power driver circuit, managing the transmission power of the VLF/LF emitter, and a synchronism channel used to send and receive a synchronism frame between the radiant elements.
  • Modular power driver circuits allow providing distinct and adjustable transmission powers for each individual radiant element. The combination of the coverage areas generated by each radiant element determines the adjustment of the global coverage area of the confinement structure to the desired profile and dimensions of each sale department.
  • the communication unit comprises remote management means of the modular power driver circuit of each radiant element independently.
  • the VLF/LF receiver of the protection devices comprises three antennae, each of which is oriented towards one of the spatial axes. This allows discriminating whether the protection device is located within the radio coverage area generated by the radiant elements or not, decreasing the uncertainty related to the spatial orientation of the device.
  • the electromagnetic confinement decoupler at least comprises one control module, governed by a microcontroller, a user identification connector, a memory storing at least one list of authorized users, a USB connector and a power supply.
  • the purpose of this element is to decouple the article protection devices by releasing them, once the shopping department vendor validates the purchase made by the customer. It also has a second function, which consists in programming the protection devices' individual parameters the first time they leave the factory or when they are intended to be used for the first time in a new or different department. It uses the VLF/LF channel to transmit the decoupling or programming codes to the protection devices, and uses the UHF channel to transmit the information related to the protection devices when it interacts with to the communication unit.
  • the decoupler's operation with respect to the protection devices for the use of the VLF/LF channel is essentially local (the protection devices are a short distance away from the decoupler).
  • an initial radiant element comprises means of control and management to synchronize the remaining radiant elements.
  • the synchronization is carried out by sending the synchronism frame from the first radiant element towards the remaining radiant elements through the UHF synchronism channel periodically.
  • all of the VLF/LF transmitters of the radiant elements must transmit at the same time, so that the radiated signals are added positively.
  • the clocks of the different transmitters have slight differences with one another, and these differences increase with time. If the transmitters were not synchronized, there would be a time when the signals radiated would not be added positively but negatively, and the coverage area would have dead zones, in which a protected element would not receive the surveillance signal and would trigger the alarm signal, even without leaving the protected commercial environment.
  • one of the radiant elements transmits a synchronization signal to the others so that the differences between the clocks of the different radiant element do not accumulate.
  • the anchoring means are selected between:
  • the radiant elements communicate with one another by means of a RS485 interface to send and receive the synchronism frames.
  • the protection system comprises a UHF jamming detector, which allows checking the existence of jammers of said UHF band, which, due to their proximity to GSM commercial bands and other uses, and also due to the size of the jammers (concealable in a pocket), could endanger the correct operation of the high-frequency channel used.
  • the communication unit itself could house the UHF inhibitor detector.
  • the system does not contemplate the use of an jammer detector in the LF/VLF band because the existence of jammers in this band is highly unlikely, aside from being too large to be transported by an individual without being visually identifiable immediately.
  • the second object of the present invention is an anti-theft asset protection method by means of electromagnetic confinement, using the aforementioned system. Said method comprises the following phases:
  • the surveillance code emitted from the radiant elements and the UHF channel used in the communications sent from the protection devices to the communication unit are specific to said confinement space and different from the ones used in another confinement space, allowing the overlap of different confinement spaces without causing interference. Since each target area (each sales department) operates with a specific surveillance code, the specific surveillance code of the area to be covered is sent periodically to the protection devices located therein; if one of them is outside of its natural area (because it is migrated to another one, for example) it will report its migration situation through its UHF channel to the system so the system can react accordingly.
  • the communication unit comprises resending the digital alerts received from the radiant elements to the external management and security platform.
  • the programming phase of the method is carried out by a user from an external electronic device connected to the decoupler and comprises the following steps:
  • the decoupling phase comprises the following steps:
  • the communication unit sends a list of the authorized user identifiers to the decoupler.
  • sending the loss of surveillance code alarm comprises the following phases:
  • the alarm is periodically sent until it is received.
  • digital alerts selected between the following are sent through a UHF channel from the protection device to the communication unit:
  • the communication unit comprises resending the alerts received from the radiant elements, from the decoupler and from the protection devices to the external management and security platform.
  • the radiant elements comprise sending alerts to the communication unit when they detect failures selected between:
  • a periodical search for UHF jammers is carried out by means of the UHF jammer detector, providing said detector with an alarm in case of finding any active jammer.
  • a protection device when a protection device receives a surveillance code that does not correspond with the surveillance code of its electromagnetic confinement area, it sends an alarm to the communication unit through its UHF channel specifying the surveillance code received.
  • the present invention is conceived to protect diverse articles located in several sales departments, it incorporates the necessary functionality to distinguish the operations between the different departments and in particular the displacement situations of articles and protection devices from a department to another.
  • the present invention complies with all the applicable regulation related to the transmission levels, the use of the spectrum, the electromagnetic compatibility and specially, the regulation related to people's safety and health.
  • the method and system object of the present invention are capable of being integrated to external electronic security platforms available in the market today.
  • This integration allows managing the electromagnetic confinement system as another of the shopping mall's electronic security subsystems, enabling the centralized supervision of its alarms and the subsequent reaction by the mall's security managers.
  • Each radiant element creates an electromagnetic radiation area around itself, its own area of influence, with a reasonably spherical geometry, little affected by the environment's construction elements, including metals, as well as by the bodies of people who could be present within the coverage area, and having a definable scope between a minimum and a maximum value.
  • the system object of the present invention contemplates two variants in the physical design of the radiant elements: the ceiling equipment variant, using a circular solenoid surrounding a half-pot ferrite core as an antenna, which is able to transmit more power in comparison to the shelf variant, which uses a solenoid with an air core as an antenna and has more compact physical design.
  • the UHF frequency band used corresponds to the frequencies within the 868-920 MHz band.
  • the selection of the UHF band is mainly determined by its properties to attain good link hauls, due to the small dimensions this band implies for the transmitting antenna to be equipped to the protection devices and the commercial availability of devices that have highly sensitivity receivers, along with a huge dynamic range exceeding 80 dB and a sensitivity exceeding -100dBm, all of which are indispensable to maintain the operation of the UHF link, despite the fact that the protection device is eventually introduced into shielding bags.
  • the UHF transceiver of the communication unit has a sensitivity higher than -100dBm and a dynamic range higher than 80 dB.
  • the VLF/LF frequency band used corresponds to the frequencies within the 10-125 kHz band.
  • This frequency band presents a large attenuation vs. distance, but it is very uniform and little impacted by the presence of metal objects, people or other electric fields. This feature allows defining the limits of the system object of the present invention in a precise and controlled manner.
  • the communication unit controls the different radiant elements so they function in a synchronized manner and with appropriate individual transmission powers, generating a single electromagnetic structure as a whole in the shape and dimensions required by the sale departmentof the articles to be protected.
  • this communication unit is in charge of communicating and integrating the electromagnetic confinement system within the external security management system.
  • each electromagnetic confinement structure or architecture shares a series of common elements for all radiant elements making up and identifying each structure. These distinctive elements are the management of a particular code sequence and the operation of a specific radiofrequency channel in the high-frequency band.
  • Figure 1 shows a general view of a particular embodiment of an anti-theft asset protection system based on electromagnetic confinement techniques object of the present invention.
  • the system (1) comprises a plurality of radiant elements, known as REs hereinafter (2a, 2b), which delimit the electromagnetic confinement area by means of the emission of the corresponding surveillance code from the VLF/LF circuits (6) they integrate.
  • the protection devices known as tags hereinafter, have a VLF/LF circuit (4) for the reception of the surveillance code and a UHF circuit (5) used to send alarms and alerts to the system.
  • REs also have a UHF circuit (7) to communicate with the communication unit (8).
  • the synchronization between the different REs (2a, 2b) is carried out by means of a RS485 synchronism circuit (9), in which one of the RE (2a) acts as the master and the remaining REs (2b) act as slaves.
  • the communication unit (8) comprising a UHF transceiver (10) for the reception of alarms and alerts from the tags (3), works as a communications gateway between the system (1) and an external management and security platform (11).
  • the communication between the two is carried out by means of an RS485/Ethernet interface adapter module integrated in the module (13) and connected to the platform (11) by means of an Ethernet driver (14) and a LAN network (15).
  • the module (13) and the communication unit (8) are connected by means of a RS485 connection (12).
  • the system 1, shown in figure 1 also comprises two decouplers/programmers of tags (16, 19) integrating a UHF circuit for the communication with the communication unit (8) and with the protection devices (3) and a VLF/LF circuit (18) for the exchange of data with the tags (3).
  • the decoupler (16), in this embodiment example, operates in a decoupling mode and the decoupler (19) operates in a programming mode.
  • the frequency used in the UHF channel is, in this embodiment example, 868 MHz.
  • a 16 KHz frequency is used in this embodiment example.
  • FIG. 2 shows a possible scenario, in which 8 radiant elements fixed to the ceiling of a room (30) generate a confinement space that adapts to the volume and geometry of said room (30).
  • three of the REs (20, 21, 22) generate confinement spaces corresponding to semi-spheres with a larger diameter than the semi-spheres generated by the other 5 radiant elements (23, 24, 25, 26, 27).
  • the 8 REs are located within a givensales department, all of them emit the same surveillance code, due to which a user would be able to move an asset (28), to which a tag (not shown) is attached, throughout the entire confinement area without triggering the alarm.
  • the alarm would only be triggered if the tag's anchoring means were manipulated or if the user left the room through the exits (29) without previously decoupling the tag from the asset.
  • Figure 3 shows an embodiment example of two physically separate scenarios (31, 32) that could correspond, for example, to two sales departments at a shopping mall.
  • the electromagnetic confinement areas hardly overlap between departments, where part of the confinement space of a department is a little bit introduced into physically adjoining departments. Due to this reason, it has been provided that the surveillance code emitted by the REs (33) of the first department (31) must be different from the surveillance code emitted by the REs (34) of the second department (32).
  • FIG. 4 shows a block diagram of an embodiment example of a tag object of the invention.
  • the tag is composed by a battery (39) supplying the internal electronics, a microprocessor (40) controlling the rest of the components and integrating a UHF transceiver.
  • the microprocessor (40) is connected to the UHF antenna (41) from which the alarms are sent. It also manages the information received from the motion detector (42), from the tamper (43) and communicates with the local sound alarm (44).
  • the microprocessor (40) comprises being connected to the VLF/LF transceiver (45), which, in turn, is connected to a VLF/LF antenna circuit composed by 3 antennae, each one of which is oriented in a spatial axis.
  • the tag is kept idle with the battery (39) being disconnected, reducing consumption and extending the life of the device, until the motion detector (42) detects that the asset, along with the tag, are moving.
  • the internal electronics are activated and they begin searching for the surveillance code by means of the VLF/LF transceiver (46). If the code is not received, the local sound alarm (44) is triggered and the UHF transceiver would send a digital alarm through the UHF antenna circuit (41) to the communication unit. Likewise, if the tamper (44) were manipulated, an alarm signal that would activate the local alarm (44) and the UHF transceiver (43) could be emitted.
  • FIG. 5 shows a block diagram of an embodiment example of a communication unit.
  • Said unit comprises a power supply circuit (48), a RS485 adapter module (49) to communicate with the management and security platform.
  • Said module (49) uses the RS485 bus driver (50) to communicate with the microprocessor (51).
  • This microprocessor has a UHF transceiver integrated to send and receive communications at high frequencies UHF through the UHF antenna circuit (52).
  • FIG. 6 shows a block diagram of an embodiment example of a radiant element.
  • Said radiant element comprises a power supply circuit (54), a RS485 adapter circuit (55) to manage the synchronism channel connected to the microprocessor (59) and an electronic control module (57) by means of a RS485 driver (56). It also has a UHF transceiver integrated to the microprocessor. It also comprises a current probe (64), connected to the power supply circuit (54) which is connected to the microprocessor (59) and the VLF/LF power driver circuit (60).
  • This power driver circuit (60) supplies a VLF/LF power amplifier, which in turn, supplies the VLF/LF antenna, determining the radiating power of the same and therefore the confinement space generated by the radiant element.
  • FIG. 7 shows an embodiment example of the internal electronics of an electromagnetic confinement decoupler.
  • the decoupler uses a support-base (65) connected directly to the network by means of a plug or a similar element (66).
  • the base (65) is directly connected to a battery-charging module (67), which is in turn connected to a power supply circuit (68).
  • a USB connector (69) for the introduction of external memories connected to a UART/USB interface adapter module (70).
  • the decoupler also comprises a microprocessor (72) connected to a username-reader connector (71), to the UART/USB interface adapter module (70) and to the VLF/LF antenna (74) by means of a VLF/LF amplifier.
  • figures 8 to 11 show various embodiment examples of the anchoring means of the protection devices.
  • figure 8 specifically shows the upper part of the tag's housing (75) and the lower part of the housing (76), within which the electronics associated to the tag are introduced.
  • the anchoring means comprise being adhesives to be stucked to the surface of the asset to be protected.
  • the lower housing (76) presents, in addition to the orifices (77) for the refrigeration of the internal electronics and the sound output for the local alarm, an overhang (78) acting as support having a ring-shaped perimetral flange (80) to which a platform (78) is fixed.
  • the flange (80) is fixed to said platform by means of actionable tabs (81).
  • the adhesive means (79) are finally located on the platform (78).
  • FIG 9 shows another embodiment example in which the anchoring means are a loop.
  • the loop fixed to the tag's lower housing (76) comprises a cable (82) and an anchoring element (83) located on the cable's free extremity (82) which is fixed to the lower housing (76) in correspondence with a box (84) existing therein.
  • FIG 10 shows another embodiment example in which the anchoring means are a spike (85) and the corresponding base (86) to which the spike (85) is inserted.
  • the lower housing (76) presents an overhang (87) to which an extremity of the spike (85) is anchored.
  • the opposite free extremity is introduced in the base (86) and is fixed therein by means of a spike retention device (87).
  • FIG 11 shows another embodiment example in which the anchoring means have been designed to be introduced into screwed orifices of the assets to be protected.
  • the tag's lower housing (76) comprises an overhang (88) with a ring-shaped perimetral flange (89), to which a platform (91) comprising screwed means (92) for their introduction into orifices is coupled by means of a tab (90).
  • Figure 12 shows an embodiment example of anchoring elements designed to be stuck to cylindrical elements, preferably bottles.
  • This is an open section profile (93), adaptable to the body or neck of a bottle. It also comprises a lateral extension (94) as a guide to fix the tag's housing (75, 76).

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Computer Security & Cryptography (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Burglar Alarm Systems (AREA)
EP12382164.7A 2012-05-04 2012-05-04 System und Verfahren zum Diebstahlschutz von Wertgegenstäden mittels elektromagnetischer Einschlusstechniken Withdrawn EP2660788A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP12382164.7A EP2660788A1 (de) 2012-05-04 2012-05-04 System und Verfahren zum Diebstahlschutz von Wertgegenstäden mittels elektromagnetischer Einschlusstechniken
PCT/ES2013/070270 WO2013164508A1 (es) 2012-05-04 2013-04-29 Sistema y método de protección de activos frente a hurtos mediante técnicas de confinamiento electromagnético

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12382164.7A EP2660788A1 (de) 2012-05-04 2012-05-04 System und Verfahren zum Diebstahlschutz von Wertgegenstäden mittels elektromagnetischer Einschlusstechniken

Publications (1)

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EP2660788A1 true EP2660788A1 (de) 2013-11-06

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Application Number Title Priority Date Filing Date
EP12382164.7A Withdrawn EP2660788A1 (de) 2012-05-04 2012-05-04 System und Verfahren zum Diebstahlschutz von Wertgegenstäden mittels elektromagnetischer Einschlusstechniken

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WO (1) WO2013164508A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2724776A1 (es) * 2018-03-09 2019-09-16 Elortegui Josu Larrauri Sistema para la gestión y control de botellas o garrafas de agua

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US7005985B1 (en) * 1999-07-20 2006-02-28 Axcess, Inc. Radio frequency identification system and method
US20070182559A1 (en) * 2005-09-15 2007-08-09 Zih Corp. Rfid antenna on multiple sides of 3-d packaging
US20080122610A1 (en) * 2000-01-24 2008-05-29 Nextreme L.L.C. RF-enabled pallet
US20100214102A1 (en) * 2008-02-22 2010-08-26 Xiao Hui Yang Asset Protection System
US20100277322A1 (en) 2009-05-01 2010-11-04 Checkpoint Systems, Inc. Transmit-only electronic article surveillance system and method
US20100295682A1 (en) * 2005-10-02 2010-11-25 Visible Assets, Inc. Radio tag and system
WO2010148038A1 (en) * 2009-06-15 2010-12-23 Adel Odeh Sayegh Article surveillance system
US20110121973A1 (en) 2008-02-22 2011-05-26 Xiao Hui Yang Asset Protection System

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CA2254832C (en) * 1998-11-30 2010-02-02 Diversity Products Ltd. An asset security tag
GB0124165D0 (en) * 2001-10-09 2001-11-28 Chizari Abolghasem Controlling the movements of articles & personnel
ES2280888T3 (es) * 2003-11-24 2007-09-16 Black & Decker Inc. Sistema inalambrico para vigilancia y seguridad de bienes.
US7187287B2 (en) * 2004-07-27 2007-03-06 Sony Corporation Systems and methods for zone security

Patent Citations (8)

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Publication number Priority date Publication date Assignee Title
US7005985B1 (en) * 1999-07-20 2006-02-28 Axcess, Inc. Radio frequency identification system and method
US20080122610A1 (en) * 2000-01-24 2008-05-29 Nextreme L.L.C. RF-enabled pallet
US20070182559A1 (en) * 2005-09-15 2007-08-09 Zih Corp. Rfid antenna on multiple sides of 3-d packaging
US20100295682A1 (en) * 2005-10-02 2010-11-25 Visible Assets, Inc. Radio tag and system
US20100214102A1 (en) * 2008-02-22 2010-08-26 Xiao Hui Yang Asset Protection System
US20110121973A1 (en) 2008-02-22 2011-05-26 Xiao Hui Yang Asset Protection System
US20100277322A1 (en) 2009-05-01 2010-11-04 Checkpoint Systems, Inc. Transmit-only electronic article surveillance system and method
WO2010148038A1 (en) * 2009-06-15 2010-12-23 Adel Odeh Sayegh Article surveillance system

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