| Patents for H02J 9 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting (16,437) |
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| 04/09/1992 | CA2052684A1 A.c. electrical power supply installation comprising a back-up power supply equipped with an inverter operating in reversible mode |
| 04/08/1992 | EP0478564A1 Safety device for vehicle passengers. |
| 04/02/1992 | WO1992005614A1 Uninterruptible power supply |
| 04/02/1992 | WO1992005613A1 Power control of solar powered display devices |
| 04/01/1992 | EP0477568A2 Arrangement for operating loads powered by a redundant power supply |
| 03/25/1992 | EP0476581A1 Apparatus for generating digital signal synchronized with phase of power supply |
| 03/25/1992 | EP0476431A2 External backup power supply |
| 03/24/1992 | US5099410 Single phase ac power conversion apparatus |
| 03/24/1992 | US5099145 System disconnection detection circuit for a distributed location power source |
| 03/19/1992 | WO1992004758A1 Improved communications and testing for emergency lighting systems |
| 03/12/1992 | DE4028190A1 Automatic door control system - uses back=up energy storage unit that is monitored to provide safe operation of doors |
| 03/11/1992 | EP0473830A1 Disposition of unities of an uninterrupted power supply with buffer battery |
| 03/11/1992 | EP0407525A4 Safety device to prevent excessive battery drain |
| 03/04/1992 | EP0473271A2 Data processing apparatus and power supply therefor |
| 02/19/1992 | EP0471178A2 Power Transfer Unit |
| 02/18/1992 | US5089762 Battery disconnect device |
| 02/04/1992 | US5086235 Power supply switchover device for electrical apparatus and teleaction terminal equipped therewith |
| 01/29/1992 | EP0468769A2 Power supply apparatus |
| 01/28/1992 | CA1295015C Dual input low drop out voltage regulator |
| 01/22/1992 | CN2094147U Automatically blocked change-over box for two-way low-voltage power supply |
| 01/21/1992 | US5083078 Device for supplying power to an electronic computer in a motor vehicle |
| 01/15/1992 | EP0465612A1 Circuit arrangement with at least one light-emitting source. |
| 01/14/1992 | US5081368 Uninterruptible power supply with a variable speed drive driving an induction motor/generator |
| 01/14/1992 | US5081367 Electric power system with maintenance bypass for uninterruptible power supply using closed transition operation |
| 01/02/1992 | EP0463593A2 Portable computer powered by rechargeable batteries |
| 01/02/1992 | EP0463261A1 IC card with improved power supply switching circuitry |
| 12/31/1991 | US5077572 Housing structure for backup battery |
| 12/24/1991 | US5075565 Two-phase uninterruptible power supply |
| 12/18/1991 | CN1057153A Solid changeover switch |
| 12/11/1991 | EP0460888A2 Improvements in battery charging circuits |
| 12/04/1991 | CN1056777A High-precision float charger |
| 12/03/1991 | US5070252 Automatic transfer switch |
| 12/03/1991 | US5070251 Computer controlled standby power supply system |
| 11/28/1991 | WO1991018340A1 Device for external protection of data processing systems against outages |
| 11/28/1991 | WO1991018339A1 Device for external protection of data processing systems against micro-outages |
| 11/27/1991 | EP0458716A2 Power system with a voltage sensitive switching circuit |
| 11/27/1991 | EP0458510A2 Circuit for sustaining power supply output following momentary interruption of commercial A.C. power |
| 11/27/1991 | EP0458155A2 Monitoring process and device for parallel connected lamps |
| 11/21/1991 | EP0456990A2 Device to supply power to a computer system in a motor vehicle |
| 11/14/1991 | WO1991015048A3 Device for supplying uninterrupted power |
| 11/14/1991 | DE4013996A1 Light with emergency back-up support - provided by battery with reed relay switching |
| 11/10/1991 | CA2036296A1 Uninterruptible power supply with dual level voltage input |
| 10/27/1991 | CA2032662A1 Power sparing circuit |
| 10/23/1991 | EP0453236A1 Apparatus for detecting the existence of an abnormality in a vehicle operator protection system |
| 10/21/1991 | CA2033685A1 Power back feed protection device |
| 10/17/1991 | DE4011790A1 Back-up power supply system - has rechargeable batteries that maintain operation if main supply fails |
| 10/15/1991 | US5057698 Shunt circuit for reducing audible noise at low loading conditions of a power supply employing a high frequency resonant converter |
| 10/15/1991 | US5057697 DC uninterrupted power supply having instantaneous switching followed by low impedance switching |
| 10/15/1991 | US5056330 Refrigerating system for use in vehicle with engine which enables selective use of commercial ac power and a generator driven by the engine for driving the refrigerant compressor |
| 10/09/1991 | EP0451110A2 Device for disconnection of loads powered by an uninterruptible power supply when a short-circuit occurs |
| 10/09/1991 | CN2086497U Emergency fluorescent lamp |
| 10/09/1991 | CN1055262A Rectifier regulator for separate constant-current and constant-voltage charge of nicd cells |
| 10/08/1991 | US5055703 Load protection circuit |
| 10/08/1991 | US5055702 Method and apparatus for controlling application of electrical power |
| 10/05/1991 | WO1991015889A1 Battery protection system |
| 10/04/1991 | CA2038484A1 Automatic transfer switch |
| 10/03/1991 | WO1991015048A2 Device for supplying uninterrupted power |
| 10/02/1991 | EP0449397A2 Power supply device for a load of a trailer vehicle |
| 10/02/1991 | EP0449154A2 Computer control system |
| 10/02/1991 | DE4108259A1 Interrupting free power supply - has pair of pulse width modulated converters coupled to provide synchronous operation |
| 10/02/1991 | DE4009077A1 Power supply with built in redundancy - has reserve stage coupled to load distributors with diode elements |
| 10/01/1991 | US5053635 Uninterruptible power supply with a variable speed drive driving a synchronous motor/generator |
| 10/01/1991 | CA1290013C Ride-through energy boost circuit |
| 09/24/1991 | US5051730 Circuit arrangement for charging rectifiers for DC energy storage devices in telecommunications systems, particularly telephone switching systems |
| 09/19/1991 | DE4017755A1 Secure current supply for DC load - uses back-up battery and dynamic rectifier operated from mains or back=up device |
| 09/18/1991 | EP0447337A1 Device for securing the proper functioning of electrical apparatus in case of main failure |
| 09/18/1991 | CN2085139U Ac/dc double-purpose emergency desk lamp |
| 09/18/1991 | CN2085107U Automatic tracking overcurrent protector for main power supply |
| 09/17/1991 | US5049805 Voltage sensitive switch |
| 09/10/1991 | US5047961 Automatic battery monitoring system |
| 09/03/1991 | US5046149 Inflatable restraint firing circuit diagnostics |
| 09/03/1991 | US5045989 PWM power supply eliminating modulation-frequency components from ground potentials |
| 09/03/1991 | US5045835 Apparatus and method for determining the existence of an abnormality in a vehicle operator protection system |
| 08/28/1991 | EP0443917A1 Power supply process and device and protection of an electronic apparatus, especially a processing apparatus |
| 08/22/1991 | WO1991012645A1 Protection and supply method and device for an electronic device, in particular a data processing device |
| 08/22/1991 | WO1991012644A1 Emergency power source |
| 08/22/1991 | DE4102636A1 Independent domestic heating and current supply system - uses engine to drive generator charging battery and control unit for monitoring |
| 08/20/1991 | US5042066 Dialer circuit |
| 08/14/1991 | CN2082912U 相位监控器 Phase Monitor |
| 08/08/1991 | WO1991011896A1 Circuit arrangement with at least one light-emitting source |
| 08/08/1991 | DE4101433A1 Building management installation with standby electric power supply - for interconnected subscriber stations not enjoying priority status for emergency supply in event of mains failure |
| 08/07/1991 | EP0439642A1 Control apparatus for inverter |
| 07/17/1991 | EP0437129A2 Card type semiconductor device |
| 07/03/1991 | EP0434905A2 A small electronic device capable of switching batteries by releasing a battery locking mechanism |
| 07/03/1991 | EP0434843A1 Switching power source device and adapter for the switching power source device |
| 07/02/1991 | US5029285 Power back feed protection device |
| 07/02/1991 | US5029061 Emergency lighting system |
| 07/02/1991 | CA1285615C Electrical power line and substation monitoring apparatus and systems |
| 06/26/1991 | EP0434002A2 Circuit arrangement for installation of uninterruptable power supplies |
| 06/26/1991 | EP0433605A2 Power supply, especially for telecommunication systems |
| 06/26/1991 | EP0433328A1 Electrical supply control system for a motor vehicle. |
| 06/25/1991 | US5027150 Camera |
| 06/19/1991 | EP0432269A1 System separation detector for power source of distributed type |
| 06/18/1991 | CA1285020C Direct current power supply with an emergency supply activated by a polarity reversal |
| 06/13/1991 | WO1991008604A1 Fast battery charging system and method |
| 06/12/1991 | EP0431486A1 Power failure in a card room |
| 06/11/1991 | US5023469 Interlock system for bypass/isolation automatic transfer switch |
| 06/11/1991 | US5023468 Safety device for car passengers |
| 06/08/1991 | CA2031467A1 Method and apparatus for spanning power failures in textile machines, especially at carding arrangements |
| 06/06/1991 | CA2022802A1 Fast battery charging system and method |