| Patents for G08B 13 - Burglar, theft, or intruder alarms (42,025) |
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| 05/03/1988 | US4742337 Light-curtain area security system |
| 04/27/1988 | EP0264491A1 Safety device in particular for cash boxes and vaults of E.G. banks |
| 04/27/1988 | CN87103056A Hidden alarming device for antitheft |
| 04/26/1988 | US4740839 TV surveillance system that requires no mechanical motion |
| 04/26/1988 | US4740701 Infrared intrusion detector |
| 04/21/1988 | DE3637960C1 Vehicle theft alarm system |
| 04/21/1988 | DE3634244A1 Optoelectronic inclination sensor |
| 04/12/1988 | US4737847 Abnormality supervising system |
| 04/12/1988 | US4737776 Circuit for detecting cut telephone service line and transmitting signal over telephone trunk line |
| 04/12/1988 | US4737762 Vehicle theft detector for detecting the pulling out of a lock |
| 04/07/1988 | WO1988002526A1 An arrangement in a purse or bag secured against theft |
| 04/07/1988 | WO1988002525A1 Sticker for alarm system |
| 04/07/1988 | WO1988000747A3 Intrusion detection system |
| 04/07/1988 | DE3632899A1 Alarm system |
| 04/06/1988 | EP0262994A1 A system for detecting a transfer of article |
| 04/06/1988 | EP0262241A1 Infra-red intrusion detector |
| 04/06/1988 | CN87213077U Automobile antitheft alarm with electronic cipher code |
| 04/05/1988 | US4736218 Camera support and housing |
| 04/05/1988 | US4736207 Tag device and method for electronic article surveillance |
| 04/05/1988 | US4736195 Method and apparatus for warning of disconnection of an appliance from a power source |
| 04/05/1988 | US4736194 Fence with security wires fastened to posts via sensors |
| 04/05/1988 | US4736098 Signalling method and apparatus for a conventional shopping cart |
| 04/05/1988 | CA1234892A1 Security tag detection system |
| 04/05/1988 | CA1234891A1 Security system label |
| 03/31/1988 | DE3732825A1 Deaktivierbare anhaenger bzw. etiketten fuer die verwendung in einem elektronischen artikel-ueberwachungssystem sowie verfahren zu ihrer herstellung Deactivateable anhaenger or labels for the use in an electronic article-supervision system and method for its manufacture |
| 03/31/1988 | DE3731917A1 Ueberlagerung in einem video-anzeigesystem By storage in a video display system |
| 03/31/1988 | DE3632111A1 Monitoring system for steel constructions |
| 03/30/1988 | EP0261917A2 Detecting changes in video data |
| 03/30/1988 | CN87207667U Alarm button guarding against theft |
| 03/29/1988 | US4734896 Burglarproofing device for a car-carried acoustic apparatus |
| 03/29/1988 | US4734725 Apparatus for photographing objects and/or persons simultaneously with the occurrence of a predetermined event |
| 03/29/1988 | US4734585 Passive infra-red sensor |
| 03/29/1988 | US4734575 Light barrier utilizing two radiation branches each having differently polarized filters |
| 03/29/1988 | US4734574 Light-projecting and-receiving unit for use in a human body detecting apparatus for automatic doors |
| 03/29/1988 | CA1234609A1 Security system transmission line |
| 03/24/1988 | WO1988002159A1 Portable optical alarm system for area protection |
| 03/24/1988 | DE3630858A1 Active glass breakage detector |
| 03/23/1988 | EP0260831A2 Dual-status, magnetically imagable article surveillance marker |
| 03/23/1988 | EP0260830A2 Magnetic marker having switching section for use in electronic article surveillance systems |
| 03/23/1988 | EP0260330A1 Theft protection for objects |
| 03/22/1988 | USRE32627 Electrical surveillance apparatus with moveable antenna elements |
| 03/22/1988 | US4733215 Remote control apparatus for a property protection device |
| 03/22/1988 | US4733081 Method and apparatus for sensing a human body |
| 03/22/1988 | US4732041 Automobile theft sensor |
| 03/22/1988 | CA1234418A1 Electronic theft detection apparatus |
| 03/16/1988 | EP0259627A2 Insulator arrangement for a capacitive protective fence |
| 03/15/1988 | CA1234212A1 Method and circuitry for the function control of ultrasonic alarm systems |
| 03/15/1988 | CA1234211A1 Method and circuitry for the function control of ultrasonic alarm systems |
| 03/10/1988 | WO1988001394A3 Proximity detectors |
| 03/10/1988 | DE3630542A1 Circuit arrangement for theft protection for electronic receiving and/or transmitting systems |
| 03/10/1988 | DE3629839A1 Method of preventing unauthorised opening of a container for valuables, such as money, securities or the like, and device for carrying out the method |
| 03/10/1988 | DE3628817A1 Intrusion detector |
| 03/09/1988 | EP0259015A2 Fault-detecting intrusion detection device |
| 03/09/1988 | EP0258526A1 Mechanical burglar alarm with a special cable connection to the protected object |
| 03/08/1988 | US4730188 Identification system |
| 03/08/1988 | US4730113 Safety system for a laser-utility facility |
| 03/08/1988 | US4730095 Method of producing planar electrical circuits |
| 03/03/1988 | DE3628956A1 Barrier fence |
| 03/03/1988 | DE3628083A1 Floor monitoring plate for antitheft protection - has optical conductors in bars linked together and coupled to central station |
| 03/01/1988 | US4729120 Method of, and circuit arrangement for, function control of ultrasonic alarm installations |
| 03/01/1988 | US4728938 Security tag deactivation system |
| 03/01/1988 | US4728937 Security means for suitcase |
| 03/01/1988 | US4727668 Coded surveillance marker with improved biasing |
| 03/01/1988 | CA1233540A1 Electronic article surveillance system having low profile antennas |
| 03/01/1988 | CA1233539A1 Crossed beam high frequency anti-theft system |
| 03/01/1988 | CA1233538A1 Security alarm apparatus |
| 02/25/1988 | WO1988001427A1 Method of remote sensing of objects |
| 02/25/1988 | WO1988001394A2 Proximity detectors |
| 02/24/1988 | EP0256651A2 Optical radiation sensitive apparatus |
| 02/24/1988 | EP0256484A1 Capacitive safety fence |
| 02/24/1988 | EP0256482A1 Capacitive safety fence |
| 02/23/1988 | US4727593 For swirching power to an electrical device |
| 02/23/1988 | US4727522 Method of, and circuit arrangement for, function control of ultrasonic alarm installations |
| 02/23/1988 | US4727360 Frequency-dividing transponder and use thereof in a presence detection system |
| 02/23/1988 | CA1233223A1 Apparatus and method for a universal electronic locking system |
| 02/23/1988 | CA1233078A1 Occupancy marker |
| 02/18/1988 | DE3627409A1 Intrusion detector |
| 02/17/1988 | EP0255885A1 Security container |
| 02/17/1988 | EP0255836A1 Signalling method and apparatus |
| 02/17/1988 | CN86105300A Ultrasonic alarm |
| 02/16/1988 | US4725823 System for transporting valuable documents |
| 02/16/1988 | US4725822 Shopping cart with lower tray signalling device |
| 02/16/1988 | CA1232959A1 Infra-red radiation detector |
| 02/11/1988 | WO1988001003A1 Safety container |
| 02/11/1988 | DE3725308A1 Baumaterial mit eingebetteter optischer faser Building materials with embedded optical fiber |
| 02/10/1988 | EP0255812A2 Monitoring device with infrared and radio-frequency sensor components |
| 02/10/1988 | CN86202454U Dual-purpose electrical device used as alarm and door bell |
| 02/09/1988 | US4724427 Transponder device |
| 02/09/1988 | US4724426 Anti-theft alarm systems for stores |
| 02/09/1988 | US4723447 Inertia-sensitive device |
| 02/09/1988 | CA1232647A1 Magnetic article surveillance system, method and coded marker |
| 02/03/1988 | EP0255073A1 Circuit device and resonance tag and method of making the same |
| 02/03/1988 | EP0254813A2 Detection method for a passive infrared motion detector and arrangement for carrying out the method |
| 02/03/1988 | CN87209078U Grating warner |
| 02/02/1988 | US4723192 Automatic electricity control monitoring exit/entry device |
| 02/02/1988 | US4723118 Magnetic detection system for items on the lower tray of a shopping cart |
| 01/28/1988 | WO1988000785A1 Transponder device |
| 01/28/1988 | WO1988000784A1 Motion detector apparatus for responding to edge information contained in a television signal |
| 01/28/1988 | WO1988000747A2 Intrusion detection system |
| 01/28/1988 | WO1988000746A1 Article security system |