| Patents for H02H 9 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection (21,232) |
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| 10/04/1989 | CN2045549U Multipurpose power-saving service life prolonging device (1) |
| 09/26/1989 | US4870534 Power line surge suppressor |
| 09/26/1989 | US4870528 Power line surge suppressor |
| 09/26/1989 | US4869688 Battery jumper cable |
| 09/26/1989 | CA1260535A1 Voltage surge arrester circuits |
| 09/19/1989 | US4868703 Solid state switching device |
| 09/14/1989 | DE3806478A1 Plug socket for installation in buildings |
| 09/12/1989 | US4866563 Transient suppressor device assembly |
| 09/12/1989 | US4866560 Safeguarding electrical transient surge protection |
| 09/07/1989 | DE3806288A1 Overvoltage protection device for an incoming-feeder circuit |
| 09/06/1989 | EP0331251A2 Overvoltage protection device for control circuits using power transistors |
| 09/06/1989 | EP0198868B1 Electrical components incorporating a temperature responsive device |
| 09/05/1989 | US4864482 Conversion circuit for limiting inrush current |
| 08/30/1989 | EP0330621A2 Current-limiting device |
| 08/29/1989 | US4862309 Protection circuit for battery feed circuit |
| 08/23/1989 | CN2043434U Plug-socket type leakance absorber |
| 08/22/1989 | US4860156 Overvoltage protective circuit |
| 08/22/1989 | US4860155 Overvoltage protection device |
| 08/22/1989 | US4860151 Electrical safety barriers |
| 08/22/1989 | US4860150 Protector network for A-C equipment |
| 08/10/1989 | WO1989007358A1 Electronic appliance |
| 08/10/1989 | DE3802796A1 Elektronisches geraet mit schaltmitteln zur daempfung von nach aussen dringenden hochfrequenten stoerspannungen Electronic geraet with switching forward for damping outwards urgent high frequency voltages |
| 08/09/1989 | EP0327475A1 Structure of a protection for the outputs of an integrated circuit of a MOS type |
| 08/09/1989 | EP0327359A1 Protector device |
| 08/09/1989 | EP0326903A1 Overvoltage protective device |
| 07/27/1989 | DE3804250C1 Circuit arrangement for a current limiter |
| 07/25/1989 | US4851956 Packaged solid-state surge protector |
| 07/25/1989 | US4851759 Unity-gain current-limiting circuit |
| 07/19/1989 | EP0324185A2 Input protecting circuit in use with a MOS semiconductor device |
| 07/19/1989 | CN1034097A Voltage stabilizer capable of limiting amplitude of open-circuit over-voltage to a great extent for arc furnace transformer |
| 07/18/1989 | US4849846 Telephone protection circuit |
| 07/18/1989 | US4849845 Transient suppressor |
| 07/18/1989 | US4849470 Computers, electronics |
| 07/12/1989 | EP0323813A1 A device for the thermal protection of an integrated electronic power circuit |
| 07/12/1989 | EP0323525A1 Digital differential signal transmission apparatus having intrinsically safe barrier |
| 07/12/1989 | CN2041084U Electricity-saving device |
| 07/11/1989 | US4847724 Overvoltage protected integrated circuit |
| 07/11/1989 | EP0306483A4 Telephone protection circuit. |
| 07/06/1989 | DE3743751A1 Electromagnetically operable contactor having a DC drive |
| 07/05/1989 | EP0323379A1 Attenuator of excess voltage with a double effect |
| 07/05/1989 | EP0323173A2 Power converter device |
| 07/04/1989 | US4845580 A.C.-D.C. Spike eliminating bandpass filter |
| 07/04/1989 | CA1256937A1 Zinc oxide stack overvoltage protection against temperature rise and thermal runaway |
| 06/28/1989 | EP0321663A2 Protection circuitry for a commutating transistor |
| 06/27/1989 | US4843515 Surge undershoot eliminator |
| 06/13/1989 | CA1255749A1 Protection arrangement for sensitive electrical installation against the effects of lighting, and devices prescribed for said arrangement |
| 06/07/1989 | CN2039073U T.v. receiver protector |
| 05/31/1989 | EP0318404A1 Monolithic protection diode assembly and protection systems |
| 05/30/1989 | US4835650 Apparatus and method for minimizing the let-through voltage associated with circuits used in conjunction with electronic elements to suppress surges, transients and like electrical disturbances |
| 05/24/1989 | CN2038285U Antishock power supply socket |
| 05/17/1989 | EP0315976A2 Superconducting current limiting apparatus |
| 05/16/1989 | US4831484 Electrical safety barrier for protection of electrical load elements placed in potentially hazardous locations |
| 05/16/1989 | US4831323 Voltage limiting circuit |
| 05/09/1989 | CA1253915A1 Overcurrent protection circuit |
| 04/26/1989 | EP0313542A2 Device for the controlled switching of inductive elements in a high-voltage network |
| 04/20/1989 | WO1989003608A1 Process and device for preventing interference of transients in a buck cell |
| 04/20/1989 | DE3734214A1 Arrangement for disconnecting a varistor |
| 04/18/1989 | US4823383 Protection device for terminal equipment on telephone subscriber premises |
| 04/13/1989 | DE3800018A1 Intermediate means plug for protection of electrical/electronic loads |
| 04/12/1989 | EP0311576A2 Active overvoltage control for inductive load driving |
| 04/12/1989 | EP0310852A1 High-voltage power system with a device for limiting switching-on overvoltages |
| 04/11/1989 | US4821315 Electronic contacts and associated devices |
| 04/11/1989 | US4821136 Power transistor with self-protection against direct secondary breakdown |
| 04/11/1989 | CA1252510A1 Electronic contacts and associated devices |
| 04/06/1989 | DE3732861A1 Circuit arrangement for the protection of low-resistance outputs |
| 04/05/1989 | EP0310281A2 Electrical safety barriers |
| 04/05/1989 | EP0310280A2 Electrical safety barriers |
| 04/05/1989 | EP0309802A2 Interface circuit for connecting test instrumentation |
| 04/04/1989 | US4819157 Overcurrent protection circuit for inverter device including majority circuit for turn-off of majority of conducting transistors |
| 03/29/1989 | EP0308642A1 Device for limiting the inrush current of a D.C. converter |
| 03/29/1989 | EP0308553A1 Transient suppressor device assembly |
| 03/21/1989 | US4814941 Power receptacle and nested line conditioner arrangement |
| 03/15/1989 | EP0306483A1 Telephone protection circuit |
| 03/14/1989 | US4812778 Isolation amplifier |
| 03/09/1989 | DE3729013A1 Circuit arrangement having a varistor as overvoltage protection for a component which contains an electrical circuit |
| 03/09/1989 | DE3728809A1 Circuit arrangement for limiting a switching-on current (connection current) |
| 03/07/1989 | US4811156 Medical current limiter |
| 03/02/1989 | DE3820807A1 Device for protection from mains surges in a three-phase mains |
| 03/02/1989 | DE3738503C1 Vehicle on-board electrical power supply system |
| 02/28/1989 | US4809124 High-energy low-voltage surge arrester |
| 02/28/1989 | US4809044 Thin film overvoltage protection devices |
| 02/28/1989 | US4808839 Power field effect transistor driver circuit for protection from overvoltages |
| 02/23/1989 | EP0224491A4 Method and circuit for providing adjustable control of short circuit current through a semiconductor device. |
| 02/22/1989 | EP0304196A2 Electric motor armature current control circuit |
| 02/21/1989 | US4807083 Surge suppressor for coax cable and AC power lines |
| 02/21/1989 | US4807081 Circuit protection arrangement |
| 02/14/1989 | US4804490 Subjecting chalcogenide galss to hydrogenated atmosphere |
| 02/09/1989 | DE3725390A1 Switching protection device |
| 02/07/1989 | US4803536 Electrostatic discharge protection network for large area transducer arrays |
| 02/07/1989 | US4803436 Method and apparatus for evaluating the condition of a gapless metal-oxide varistor lightning arrester used for protecting a distribution transformer |
| 01/31/1989 | US4802055 Transient voltage surge suppressor |
| 01/26/1989 | DE3823922A1 Elektronische schaltvorrichtung mit leistungsueberwachung und integrierter absicherung fuer elektrische schaltkreise Electronic switching device with integrated leistungsueberwachung and hedging for electrical circuits |
| 01/25/1989 | EP0300872A1 Filtering device for common types disturbances acting on a static power converter's electronic cards |
| 01/25/1989 | EP0300434A2 Overcurrent protection circuit for semiconductor device |
| 01/25/1989 | EP0300091A2 Multiple time delay power controller apparatus with time delay turn-on and turn-off |
| 01/24/1989 | US4800329 Device for limiting inrush current |
| 01/17/1989 | US4799125 Circuit protection arrangement |
| 01/12/1989 | WO1989000367A1 Digital differential signal transmission apparatus having intrinsically safe barrier |
| 01/12/1989 | DE3813609A1 Isolating element (interrupting element) for protective earthing |
| 01/11/1989 | CN2030772U Full-automatic protective arrangement for motor |