Patents
Sitemap › G08 - Signalling › G08B - Signalling or calling systems; Order telegraphs; Alarm systems › G08B 29 - Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
Patents for G08B 29 - Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation (6,872)
06/1990
06/27/1990EP0222014B1 Fire sensor cross-correlator circuit and method
06/21/1990DE3842053A1 Circuit for monitoring DC-operated electronic alarm systems having a signal line
06/20/1990EP0373716A2 An anti-tamper device
06/10/1990CA2005068A1 Anti-tamper device
05/1990
05/29/1990US4930095 Output correction system for analog sensor
05/22/1990CA1269458A1 Fire sensor statistical discriminator
05/16/1990EP0368710A1 Devices for discriminating between a number of simultaneous phenomena
05/16/1990CN1008008B Light barrier
05/15/1990US4926364 Method and apparatus for determining weighted average of process variable
05/15/1990US4926162 High security communication line monitor
05/15/1990CA1269140A1 Walk through test system
05/15/1990CA1269139A1 Security system with enhanced protection against compromising
05/09/1990EP0367402A1 An intrusion detection system and a method therefor
05/08/1990US4924417 Environmental abnormality alarm apparatus
05/08/1990US4924206 Car security system and method
05/02/1990EP0366527A1 Security system with radioelectric transmission
05/02/1990EP0366166A2 Method and device for detecting abnormal situations in ultrasonic antitheft systems particularly for motor vehicles
05/01/1990US4922224 Electronic vehicle security system
04/1990
04/24/1990CA1268232A1 Unitary alarm sensor and communication package for security alarm system
04/18/1990EP0364107A1 False alarm minimization and direction determination methods
04/11/1990EP0363216A2 Intrusion detection apparatus
04/11/1990EP0233245B1 Fire sensor statistical discriminator
04/07/1990CA2000270A1 Intrusion detection apparatus
04/03/1990US4914420 Telecommunication system including a remote alarm reporting unit
03/1990
03/28/1990EP0360126A2 Operation method for an optical smoke detector and smoke detector for carrying out the method
03/13/1990US4908602 Apparatus and method of testing a portable held button for emergency response system
03/07/1990EP0357343A2 Method and apparatus for protecting electrical equipment
03/06/1990US4906979 Monitoring system with microprocessor and watchdog circuit monitoring each other
02/1990
02/22/1990DE3828112A1 Device for the testing of the functioning of a thermostatic detector in a region at risk of explosion
02/20/1990US4903011 Lamp drive circuit
02/13/1990US4901316 Disaster prevention monitoring and control facility
02/13/1990US4901056 In an electrical unit
01/1990
01/23/1990CA1264832A1 Fault detecting intrusion detection device
01/16/1990US4894601 Testing and battery exercising method and control for an emergency lighting unit
01/10/1990EP0350440A1 Pressure surveillance device for a temperature detector
01/10/1990EP0350119A1 Stand-alone utility device with antitheft code
01/03/1990EP0348772A1 Failure detecting circuit with alarm
12/1989
12/19/1989US4888579 False alarm minimization and direction determination methods
12/12/1989US4887064 Multi-featured security system with self-diagnostic capability
12/05/1989US4885571 Tag for use with personnel monitoring system
11/1989
11/30/1989DE3817607A1 Method for triggering UV-sensitive receiving elements
11/29/1989EP0344138A2 Secure personnel monitoring system
11/28/1989US4884222 Fire alarm system
11/28/1989US4884059 Apparatus and method for reporting verification testing of a personal emergency response system
11/21/1989US4882567 Intrusion detection system and a method therefor
11/16/1989DE3815691A1 Security alarm device and its use for energy conversion plants
11/15/1989EP0140502B1 Improvements relating to smoke detection apparatus
11/14/1989US4881060 Fire alarm system
11/08/1989EP0341022A2 Room monitoring and control system
11/02/1989EP0339861A2 Paging apparatus with improved message display function
10/1989
10/18/1989EP0337964A1 A combined microwave and infra-red detector device, particularly for anti-intrusion systems
10/17/1989US4875198 Intrusion detection apparatus
10/17/1989US4875029 Suppressed transient uniform detection sensitivity pir detector
10/17/1989US4873936 Switching mechanism for anti-theft system
10/12/1989DE3909807A1 Remote control
09/1989
09/27/1989EP0333771A1 Personal alarm system.
09/26/1989US4870395 Battery powered smoke alarm safety lockout system
09/26/1989US4870394 Smoke detector with improved testing
09/26/1989CA1260545A1 Security monitoring system
09/19/1989US4868859 Supervised, interactive alarm reporting system
09/19/1989US4868561 Method of reprogramming an alert pattern
09/12/1989US4866425 Detector for sensing and/or measuring passing objects
09/05/1989US4864146 Universal fire simulator
08/1989
08/29/1989US4862314 System for providing power to a central office protector module with alarm indicator and including remote alarm indication
08/29/1989US4862145 Pest monitoring system
08/29/1989US4861998 Rapid fire-detection device for armored vehicles
08/24/1989WO1989007814A1 Security system for an environment
08/23/1989EP0328985A2 Warning radio receiver
08/23/1989EP0328973A2 Radio receiver
08/23/1989EP0328709A1 Light barrier
08/22/1989US4859075 Laser thermal testing method and system for use with a fire alarm system
08/16/1989EP0328438A2 Apparatus and method for protecting the contacts of an electrical switch from current surges
08/15/1989US4857912 Intelligent security assessment system
08/15/1989US4857883 Call device-attached patrol recorder
08/02/1989EP0187149B1 Fire sensing and suppression method and system responsive to optical radiation and mechanical wave energy
08/01/1989US4853685 Switch monitoring arrangement with remote adjustment capability having debounce circuitry for accurate state determination
07/1989
07/25/1989US4852046 Control system improvements in or relating to burner
07/18/1989US4850018 Security system with enhanced protection against compromising
07/18/1989US4849734 Self-diagnostic circuit for alarm-systems
07/13/1989WO1989006412A1 Test initiation apparatus with continuous or pulse input
07/11/1989US4847719 Apparatus and method for protecting the contacts of an electrical switch from current surges
07/11/1989US4847593 Transmission circuit of fire protection/security system
07/11/1989US4847488 Sabotage resistant light barrier wherein radiation is polarized into two opposite types of polarization
07/11/1989CA1257356A1 Fire alarm system
07/05/1989EP0323266A2 Suppressed transient uniform detection sensitivity pir detector
07/04/1989US4845464 Shock/vibration disturbance events to a vehicle
07/04/1989CA1256976A1 Self-diagnostic ultrasonic intrusion detection system
06/1989
06/27/1989US4843378 Failure alarm device for an appliance
06/27/1989US4843244 Security sensors
05/1989
05/24/1989EP0317459A2 Acoustic pressure differential detector in an alarm device
05/24/1989EP0316853A1 Cableless danger signal system
05/24/1989EP0316493A1 Device for monitoring the proper electric and/or mechanic functioning of electro-magnetic-type indicator elements
05/23/1989US4833451 Individual source identification
05/23/1989US4833450 Fault detection in combination intrusion detection systems
05/16/1989US4831361 Environmental abnormality alarm apparatus
05/09/1989US4829290 Low voltage alert circuit
05/09/1989US4829283 Supervision arrangement for smoke detectors
05/05/1989WO1989004029A1 Intrusion detector
05/02/1989US4827247 Self-compensating projected-beam smoke detector
05/02/1989US4827244 Test initiation apparatus with continuous or pulse input
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