| Patents for H02J 9 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting (16,437) |
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| 10/10/1993 | CA2089958A1 Distributed power supply system |
| 10/06/1993 | EP0564417A1 Charge control apparatus and electronic apparatus provided with such a control apparatus |
| 10/05/1993 | US5251179 Switching means having set and reset means |
| 10/05/1993 | US5250786 D-C arc welding apparatus |
| 09/30/1993 | WO1993019508A1 A power supply and battery charging system |
| 09/29/1993 | EP0562772A1 Holdover circuit for AC-to-DC converters |
| 09/29/1993 | CN1022275C Rectifier regulator for separate constant-current and constant-voltage charge of Nicd cells |
| 09/21/1993 | US5247205 Power supply apparatus |
| 09/16/1993 | WO1993018300A1 Electric power source for pulsed load |
| 09/15/1993 | CN2142239Y Quick switching over apparatus for double-alternating voltage power supply |
| 09/07/1993 | US5243269 Battery power supply system |
| 09/01/1993 | EP0557287A1 Electrical energy system. |
| 08/31/1993 | US5241217 UPS with input commutation between AC and DC sources of power |
| 08/26/1993 | DE4305219A1 Multiplex communication system for automobile - switches to low power consumption mode via decision stage, bringing slave stations into standby mode to prevent battery drainage. |
| 08/25/1993 | EP0556583A1 Device for a galvanic separated DC supply of a micro-computer from an AC source |
| 08/24/1993 | US5239495 Power supply control system for a portable computer |
| 08/19/1993 | DE4214897C1 Circuit for protection of electronics against transient voltage surges - has detector stage that identifies increase and switches supply to internal arrangement having capacitor and constant current supply |
| 08/17/1993 | US5237260 Engine-operated generator system |
| 08/17/1993 | US5237258 Unique computer power system with backup power |
| 08/17/1993 | US5237208 Apparatus for parallel operation of triport uninterruptable power source devices |
| 08/12/1993 | DE4203829A1 DC voltage supply for portable equipment, e.g. personal computer - has switched coupling stage that provides fast changeover between internal battery and mains unit |
| 08/11/1993 | CN1021788C Solid changeover switch |
| 08/10/1993 | US5234319 Sump pump drive system |
| 08/04/1993 | CN1021757C High-precision float charger |
| 08/03/1993 | US5233271 Starting device and lamp base construction for a Philips lamp |
| 08/03/1993 | US5233230 Power cord |
| 07/20/1993 | US5229651 Method and apparatus for line power monitoring for uninterruptible power supplies |
| 07/20/1993 | US5229650 Uniterruptible power system |
| 07/13/1993 | CA1320247C Back-up electrical system for lamps |
| 07/13/1993 | CA1320246C Emergency lighting system having remote test capability |
| 07/07/1993 | EP0550348A1 High quality electrical power distribution system |
| 06/29/1993 | US5223748 Battery manager |
| 06/24/1993 | WO1993012570A1 Method and apparatus for providing battery charging in a backup power system |
| 06/23/1993 | EP0547418A2 Power system for parallel operation of AC/DC converters |
| 06/22/1993 | US5221862 A.c. electrical power supply system including a backup power supply equipped with an inverter operating in reversible mode |
| 06/22/1993 | US5221861 Voltage maintenance system |
| 06/22/1993 | CA1319412C Apparatus for parallel operation of triport uninterruptable power source devices |
| 06/10/1993 | WO1993011593A1 Arrangement for the off-mains switching of control devices |
| 06/09/1993 | CN2135900Y 改进的日光灯装置 Improved fluorescent devices |
| 06/08/1993 | US5218284 Integral battery charging and supply regulation circuit |
| 06/08/1993 | US5216994 Fuel injection system for internal combustion engine |
| 06/03/1993 | DE4139647A1 Anordnung zur netzfreischaltung von steuereinrichtungen Arrangement for mains cut-off of tax facilities |
| 06/01/1993 | US5216286 Uninterrupted power conditioner circuit |
| 06/01/1993 | US5216284 Passenger safety device for vehicles |
| 05/28/1993 | CA2083123A1 High quality electrical power distribution system |
| 05/27/1993 | DE4238316A1 Driving system for interruption free current supply - using lower battery discharge voltage equal to lower terminal voltage and lower drop between battery and load input |
| 05/25/1993 | US5214352 Light dimming system for emergency operation |
| 05/25/1993 | CA1318351C Backup protection switch to prevent reverse power flow in a ups |
| 05/19/1993 | EP0542344A2 Device for supplying electrical energy to a load |
| 05/19/1993 | CN2133981Y High-efficient emergent fluorescent lamp |
| 05/19/1993 | CN1072295A Power inverting method and system |
| 05/18/1993 | US5212478 Dynamic power recovery system |
| 05/18/1993 | US5212373 Non-contact ic card |
| 05/12/1993 | CN2133088Y Emergency light with double luminous source and automatic switchover |
| 05/11/1993 | US5210685 Uninterruptible power supply system and load transfer static switch for such a system |
| 05/11/1993 | CA1317636C System and method for power supply preservation in a personal health monitor |
| 05/11/1993 | CA1317635C A.c. power supply apparatus |
| 04/28/1993 | EP0539301A1 Coupling device of an external power supply to an aircraft on the ground |
| 04/28/1993 | CN2131272Y Automatic ac-dc conversion power supply unit for fluorescent lamps |
| 04/27/1993 | US5206538 Automatic system battery reconnect circuit responsive to insertion of new battery replacement |
| 04/21/1993 | EP0537651A2 Controlling and monitoring device for a safety-lighting unit |
| 04/20/1993 | US5204610 Long lived dual battery with automatic latching switch |
| 04/15/1993 | WO1993007556A1 Power supply control system |
| 04/14/1993 | CN2130001Y Artificial power storage type emergency power supply |
| 04/14/1993 | CN2129997Y Automatic connection device for battery tap |
| 04/13/1993 | US5202817 Hand-held data capture system with interchangeable modules |
| 04/13/1993 | US5202608 Emergency lighting system utilizing improved and rapidly installable fluorescent inverter |
| 04/08/1993 | DE4227462A1 Microcomputer with at least one voltage changover circuit for two switching elements - prevents leakage current caused by deviations in transistor parameters arising during manufacture. |
| 04/06/1993 | US5200877 Battery protection system |
| 04/06/1993 | US5200644 Air conditioning system having battery for increasing efficiency |
| 04/01/1993 | WO1993006644A1 Measuring process for obtaining a switching command in a rapid changeover device |
| 03/31/1993 | EP0534793A1 Emergency lighting apparatus |
| 03/30/1993 | US5198970 A.C. power supply apparatus |
| 03/30/1993 | US5198698 Auxiliary power supply system for providing dc power on demand |
| 03/30/1993 | CA1315331C Emergency lighting supervisory system |
| 03/24/1993 | EP0533175A2 A controller for electric power distribution apparatus |
| 03/23/1993 | US5196781 Method and apparatus for power control of solar powered display devices |
| 03/23/1993 | CA1314932C Off-line switcher with battery reserve |
| 03/19/1993 | EP0571383A4 Battery protection system. |
| 03/16/1993 | US5194757 Uninterruptible power supply |
| 03/02/1993 | US5191529 Trip recorder operation and memory retention extension through multiple battery backup and a load shedding strategy triggered by a primary power interruption |
| 03/02/1993 | US5191500 Power supply circuit for an automobile |
| 03/02/1993 | US5191229 Power source transferring |
| 03/02/1993 | US5191227 Apparatus for transferring control of a plurality of electrical devices upon interconnection |
| 02/24/1993 | CN1069367A Ac/dc automatic conversion power supply for fluorescent lamp |
| 02/23/1993 | US5189600 Combined power supply for main and stand-by power |
| 02/18/1993 | WO1993003532A1 Electrical energy system |
| 02/16/1993 | US5187382 Apparatus for detecting the existence of an abnormality in a vehicle operator protection system |
| 02/09/1993 | US5185536 Uninterruptible power supply having improved battery charger |
| 02/03/1993 | EP0525133A1 Fail-safe uninterruptible lighting system |
| 02/02/1993 | US5184025 Computer-controlled uninterruptible power supply |
| 01/26/1993 | US5182546 Electronic apparatus which can discriminate between different power sources which it uses |
| 01/26/1993 | US5182518 Inverter and battery testing for uninterruptible power systems |
| 01/26/1993 | US5182464 High speed transfer switch |
| 01/19/1993 | US5181091 Integrated circuit with improved protection against negative transients |
| 01/13/1993 | EP0521901A1 Device for supplying uninterrupted power. |
| 01/13/1993 | EP0433328B1 Electrical supply control system for a motor vehicle |
| 01/12/1993 | US5178403 Electrical energy generating device for a wheeled semi-trailer |
| 01/07/1993 | EP0521424A1 Shunt connected superconducting energy stabilizing system |
| 01/06/1993 | CN1067632A Apparatus for operating elevators when electricity is ceased |