| Patents for G08B 13 - Burglar, theft, or intruder alarms (42,025) |
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| 04/29/1981 | EP0027738A2 Intrusion alarm system |
| 04/28/1981 | US4264899 Portable alarm for entry detection |
| 04/28/1981 | CA1100208A1 Intrusion warning system |
| 04/22/1981 | EP0027139A1 Intrusion alarm system |
| 04/21/1981 | US4263665 Ultrasonic intrusion alarm system |
| 04/21/1981 | US4263586 Pressure operated electric switch and alarm system using such switch |
| 04/21/1981 | US4263585 Intrusion detection system with a segmented radiation sensing mirror |
| 04/21/1981 | US4263584 Regenerative feedback intruder alarm apparatus |
| 04/14/1981 | CA1099380A1 Vibration-responsive intruder alarm system |
| 04/08/1981 | EP0026461A2 Circuit arrangement for intrusion or fire alarm systems |
| 04/08/1981 | EP0026385A1 Ultrasonic space surveillance system according to the pulse-echo method |
| 04/08/1981 | EP0026383A1 Alarm system for the protection of glass surfaces, especially show-window panes |
| 04/08/1981 | EP0026202A1 Video monitoring system and method |
| 04/07/1981 | US4260990 Asymmetrical antennas for use in electronic security systems |
| 04/07/1981 | US4260983 Presence sensing detector and system for detecting a receiver/transmitter device affixed to an article |
| 04/07/1981 | US4260982 Pulse code modulation responsive alarm system |
| 04/07/1981 | US4260981 Physical condition monitoring system for detection in remote places |
| 04/07/1981 | US4260881 Electronic status determining label |
| 04/01/1981 | EP0025983A2 Arrangement to prevent false alarms by passive infrared-movement signallers |
| 03/24/1981 | US4258358 Door opening sensing and alarm producing device |
| 03/24/1981 | US4258255 Infrared intrusion detection system |
| 03/18/1981 | EP0025188A1 Optical arrangement for a photodetector |
| 03/17/1981 | US4257063 Video monitoring system and method |
| 03/11/1981 | EP0024630A2 Anti-theft device for a valuables transportation-container |
| 03/10/1981 | US4255745 Apparatus for audible altering of enclosure opening |
| 03/10/1981 | CA1097151A1 Intruder alarm |
| 03/05/1981 | WO1981000636A1 Detection device with detector |
| 03/03/1981 | US4254485 Temperature measuring apparatus with alarm device |
| 03/03/1981 | US4254483 Ultrasonic intrusion alarm system |
| 03/03/1981 | US4254413 E Field balanced phase intrusion alarm |
| 03/03/1981 | US4254400 Image data processor |
| 02/24/1981 | US4253095 Alarm apparatus for detecting disturbance or other change of condition |
| 02/24/1981 | US4253094 Timed alarming using logical inverters |
| 02/17/1981 | US4251808 Shielded balanced loop antennas for electronic security systems |
| 02/10/1981 | US4250499 Sound level detector with program interrupt |
| 02/10/1981 | US4250498 Light barrier receiver |
| 02/10/1981 | CA1095302A1 Optics for infrared intrusion detector |
| 02/04/1981 | EP0023354A1 Pyrodetector |
| 02/03/1981 | US4249207 Perimeter surveillance system |
| 02/03/1981 | US4249167 Apparatus and method for theft detection system having different frequencies |
| 01/28/1981 | EP0022831A1 Alarm device for doors. |
| 01/27/1981 | US4247847 Vibration-detecting intrusion alarm |
| 01/27/1981 | US4247765 Pulsed feedback circuit for an optoelectronic detector |
| 01/22/1981 | WO1981000043A1 Security apparatus |
| 01/21/1981 | EP0022693A1 Electronic device for intrusion detection in an area |
| 01/20/1981 | US4246573 Protection system for electronic gear |
| 01/13/1981 | US4245219 Treadle alarm system |
| 01/13/1981 | US4245217 Passive infrared alarm device |
| 01/13/1981 | US4244652 Ferroelectric length measuring and moving target transducer with memory |
| 01/13/1981 | CA1093656A1 Safety lock system |
| 01/07/1981 | EP0021849A1 Reusable releasable fastener |
| 01/07/1981 | EP0021670A1 Code type lock especially for safes |
| 01/07/1981 | EP0021630A2 Infrared intrusion detector and optical system for such a detector |
| 01/07/1981 | EP0021611A1 Security system sensor |
| 01/07/1981 | EP0021163A1 Plane intrusion security system |
| 01/07/1981 | EP0020917A1 Optical arrangement for a passive infrared movement detector |
| 01/07/1981 | EP0020602A1 Event detection and indication system |
| 01/06/1981 | US4243980 Antenna system for electronic security installations |
| 01/06/1981 | US4243979 Burglar alarm security circuit arrangement |
| 12/30/1980 | US4242743 Intrusion detection method and apparatus |
| 12/30/1980 | US4242671 Transponders |
| 12/30/1980 | US4242670 Photosensitive alarm systems |
| 12/30/1980 | US4242669 Passive infrared intruder detection system |
| 12/30/1980 | CA1092677A1 Pas de traduction disponible |
| 12/23/1980 | US4241376 System for automatically selecting operations in a random sequential manner |
| 12/23/1980 | US4241338 Ambient noise intruder alarm |
| 12/23/1980 | US4241337 Appliance door position sensor arrangement |
| 12/23/1980 | US4241335 Automatically supervised alarm system |
| 12/11/1980 | WO1980002764A1 Process for the surveyance of premises by means of directional pulse waves and installation for carrying out such process |
| 12/10/1980 | EP0020062A1 Method and surveillance system for detecting the presence of an e.m. wave receptor reradiator |
| 12/09/1980 | US4238675 Optics for infrared intrusion detector |
| 12/02/1980 | US4237483 Surveillance system |
| 12/02/1980 | US4237450 Appliance theft alarm |
| 11/25/1980 | US4236180 Monitoring system for monitoring a field |
| 11/25/1980 | US4236148 Theft deterring and signalling device for portable fire extinguishers |
| 11/25/1980 | US4236147 Automatic doorbell |
| 11/25/1980 | CA1090482A1 X-ray inspection system for security screening application |
| 11/18/1980 | US4234875 Security structure |
| 11/11/1980 | US4233595 Chain-type door latch and alarm |
| 11/11/1980 | CA1089553A1 Alarm device for use in combination with window sash |
| 11/04/1980 | US4232310 Protective window screen assembly |
| 11/04/1980 | US4232309 Roller shutter |
| 11/04/1980 | US4232292 Data transmitter device |
| 11/04/1980 | CA1089050A1 Asymmetric antipilferage marker |
| 10/30/1980 | WO1980002338A1 Intrusion alarm system |
| 10/29/1980 | EP0018206A1 Method of monitoring stored nuclear fuel elements |
| 10/29/1980 | EP0018071A1 A security system |
| 10/29/1980 | EP0018033A1 Radiation detector devices and circuit arrangements including radiation detector devices |
| 10/29/1980 | EP0017821A1 Process and circuit for evaluation of stationary television pictures consisting of lines and frames used for detecting a brightness variation cansed by a moving object |
| 10/29/1980 | EP0017801A1 Amorphous antipilferage marker and detection system comprising same |
| 10/28/1980 | US4230450 Intrusion alarm safety |
| 10/28/1980 | CA1088663A1 Vibration-responsive intruder alarm system |
| 10/21/1980 | US4229811 Intrusion detection method and apparatus |
| 10/21/1980 | CA1088177A1 Burglar alarm |
| 10/15/1980 | EP0017547A1 Proximity detector and use thereof |
| 10/15/1980 | EP0016833A1 Silent wearable signalling device for tactile means to prevent false triggering |
| 10/15/1980 | EP0016809A1 System for the registration of the passage of articles through a previously determined field |
| 10/14/1980 | US4228425 Tamper-proof transparent security plate |
| 10/14/1980 | US4228424 Central station alarm |
| 10/14/1980 | US4227766 Security method and system |