| Patents for G08B 21 - Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for (34,716) |
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| 12/11/1979 | US4178589 Thumb-sucking alarm system |
| 12/04/1979 | US4177460 Two-way alarm safety apparatus |
| 11/20/1979 | US4175263 Technique for monitoring whether an individual is moving from a particular area |
| 10/31/1979 | EP0004969A1 Device for automatically monitoring the state of charge of line-independent current sources |
| 10/09/1979 | US4170770 Gas leak-detecting apparatus |
| 09/25/1979 | CA1063208A1 Incipient fire detector |
| 09/20/1979 | WO1979000691A1 Thermostat control for heating and/or cooling system |
| 09/18/1979 | US4168496 Quasi-stationary noise cancellation system |
| 08/23/1979 | WO1979000580A1 Electrically isolated illumination control for dental drill |
| 08/21/1979 | US4165458 Signal decision system |
| 07/24/1979 | US4162489 Fire alarm system comprising a plurality of alarms which may be operated by way of an alarm loop |
| 07/17/1979 | US4161750 Video alarm systems |
| 06/19/1979 | US4158807 Gapped gate charge-flow transistor with a thin film sensor having two modes of conduction within the gapped gate used to sense a property of the ambient environment |
| 06/13/1979 | EP0002232A2 System and method for monitoring the operation of an apparatus |
| 05/29/1979 | US4156865 High load clearance sensors |
| 05/15/1979 | US4155077 Apparatus for audible alerting of enclosure opening |
| 05/08/1979 | CA1054251A1 Intruder detecting security system |
| 05/02/1979 | EP0001611A2 Apparatus and method for detecting substances and for regulating current |
| 04/24/1979 | US4151520 Portable self-contained alarm with remote triggering capability |
| 04/17/1979 | CA1052887A1 Smoke detector |
| 04/10/1979 | US4149159 Fire detection system |
| 03/27/1979 | US4146885 Infant bed and apnea alarm |
| 03/13/1979 | US4144531 Drowsiness detecting apparatus |
| 02/13/1979 | CA1048366A1 Chemically activated warning system |
| 01/23/1979 | US4136338 Perimeter alarm apparatus |
| 01/09/1979 | US4134108 Emergency alarm device |
| 12/19/1978 | US4130817 Tire pressure warning devices |
| 12/19/1978 | US4130763 Machine guard installations |
| 12/19/1978 | US4130104 Glow wire ignition with on/off and hot warning means for gas heated stove |
| 12/12/1978 | US4129030 Sensing apparatus and method |
| 11/28/1978 | US4127031 Boat theft detector |
| 11/28/1978 | CA1043440A1 Vehicle systems monitor |
| 11/14/1978 | CA1042228A1 Water depth measuring device |
| 11/07/1978 | US4124840 Alarm system |
| 10/31/1978 | US4122854 Electrosurgical apparatus |
| 10/17/1978 | US4121200 Swimming pool alarm system |
| 10/17/1978 | US4121160 Switch means for radio alarm device |
| 10/03/1978 | US4118693 Method and apparatus for producing uniform electromagnetic fields in an article detection system |
| 10/03/1978 | CA1039812A1 Alarm device |
| 08/29/1978 | US4110741 Device for monitoring physical activity of persons |
| 08/29/1978 | US4109509 Oxygen monitor and warning device for an aircraft breathing system |
| 08/01/1978 | US4104628 High output audible alarm device utilizing a piezoelectric transducer and voltage doubling means |
| 08/01/1978 | US4104621 Steering-wheel reversal driver alertness monitor |
| 07/18/1978 | US4101873 Device to locate commonly misplaced objects |
| 07/18/1978 | US4101869 Vehicle warning devices |
| 07/11/1978 | US4100537 Monitor for gas piping system |
| 07/11/1978 | US4100536 Bio-alarm security system |
| 06/27/1978 | US4097843 Warning device and receptacle adaptor |
| 06/20/1978 | US4096468 Solid state sequence logic circuit |
| 05/30/1978 | US4092635 Humidity sensor alarm unit |
| 05/30/1978 | US4092633 Condition sensor system and method |
| 05/16/1978 | US4090193 Frequency multiplexed water leak detection system |
| 05/02/1978 | US4087783 Wheel interference monitor |
| 04/18/1978 | US4084377 Brake system failure condition indicator |
| 04/04/1978 | US4083041 Ground circuit monitor |
| 03/21/1978 | US4080598 Safety circuit for electric device |
| 03/21/1978 | US4080595 Wallet guard |
| 03/14/1978 | US4079364 Water safety alarm apparatus |
| 02/14/1978 | US4074245 Power failure alarm |
| 01/17/1978 | US4069405 Swimming pool alarm system |
| 01/10/1978 | US4068223 Monitor system for agricultural harvesting apparatus |
| 01/10/1978 | US4068221 Immersion responsive sensor |
| 01/03/1978 | US4067005 Invalid bed system |
| 01/03/1978 | US4067004 Remote personnel station alarm system |
| 11/29/1977 | US4060716 Method and apparatus for automatic abnormal events monitor in operating plants |
| 11/22/1977 | US4059830 Sleep alarm device |
| 11/08/1977 | US4057805 Radio-controlled machine power cut-off |
| 11/08/1977 | US4057794 Calling aids |
| 11/08/1977 | US4057790 Personal aid signalling system |
| 10/25/1977 | US4055839 Foaling alarm |
| 08/16/1977 | US4042918 Apparatus indicating an absent golf club |
| 07/19/1977 | US4037223 Audible alarm system for an electrical outlet |
| 06/14/1977 | US4030086 Battery voltage detection and warning means |
| 05/24/1977 | US4025892 Probe for detecting gaseous polar molecules such as water vapor |
| 05/10/1977 | US4023156 Alarm system for detecting disturbance of a solid medium |
| 05/10/1977 | US4023151 Communication appliance operating device |
| 04/26/1977 | US4020478 Moisture detecting device |
| 04/12/1977 | US4017843 Vehicle driver alertness apparatus monitoring steering wheel oscillations |
| 04/12/1977 | US4017842 Swimming pool alarm system and method with adjustable sensitivity |
| 04/05/1977 | US4016535 Tilt alarm for tractor vehicle or the like |
| 04/05/1977 | US4016524 Sensor for a gas detector, in particular for smoke detection |
| 03/22/1977 | US4013067 Warning apparatus for indicating a threat of impending shock |
| 03/15/1977 | US4012732 Security device |
| 03/08/1977 | US4011553 Remote detector to indicate leakage of liquids in toilet tanks |
| 02/01/1977 | US4006473 Irrigation signal |
| 01/11/1977 | US4003044 Alarm device having an oscillator |
| 01/11/1977 | US4002397 Connector for electric plug |
| 01/04/1977 | US4001771 Intruder detecting security system |
| 01/04/1977 | US4000543 Monitor actuating device and reusable fastener therefor |
| 12/21/1976 | US3999178 Orientation responsive alarm system |
| 12/21/1976 | US3999079 Fire detector |
| 12/14/1976 | US3997889 Alarm system for indicating a fault condition of an anti-skid braking control system |
| 12/14/1976 | US3997886 Liquid contamination detector |
| 11/30/1976 | US3995262 Electric lamp failure indicator circuit |
| 11/16/1976 | US3992706 Liquid level monitoring apparatus |
| 11/02/1976 | US3990064 Alarm indicator responsive to improper position of a control lever |
| 10/26/1976 | US3988727 Timed switching circuit |
| 10/19/1976 | US3987425 Leakage resistance detector and alarm circuit |
| 10/12/1976 | US3986110 Water depth measuring device |
| 09/21/1976 | US3982238 Time based monitoring system |