| Patents for H02H 9 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection (21,232) |
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| 01/10/1989 | US4797773 Spatial array filtering system for electrical devices |
| 01/10/1989 | CA1248584A1 Shunt arrangement |
| 01/04/1989 | CN2030387U Automatic protector for 220v single-phase source |
| 12/21/1988 | EP0296054A1 Protective device of an electronic equipment against strong electromagnetic pulses, in particular those generated by lightning |
| 12/21/1988 | EP0295683A2 Protection circuit for battery feed circuit |
| 12/21/1988 | CN87103956A Portable single-tube multi-wire speaking protective device |
| 12/20/1988 | US4792877 Electric motor armature current control circuit |
| 12/20/1988 | CA1247191A1 Power receptacle and associated filter |
| 12/15/1988 | DE3718592A1 Electric control circuit for a heating element |
| 12/07/1988 | EP0294139A2 Safety barriers for 2-wire transmitters |
| 12/06/1988 | CA1246142A1 Device for protecting an electrical power line against high transient overvoltages |
| 11/29/1988 | CA1245712A1 Station protector assembly |
| 11/23/1988 | EP0292082A1 Frequency-dependent overvoltage protective device for high voltage appliances |
| 11/15/1988 | CA1244861A1 Electrical components incorporating a temperature responsive device |
| 11/02/1988 | EP0289431A1 Integrated circuit protected against overvoltages |
| 10/19/1988 | EP0287304A2 Fault tolerant/failsafe current unit |
| 10/19/1988 | EP0286740A1 Transient suppressor |
| 10/19/1988 | EP0286739A1 Transit suppression system |
| 10/18/1988 | US4779062 Short circuit current limiter |
| 10/13/1988 | DE3710520A1 Remote-controlled mechanism for protective (safety) switches (automatic circuit breakers) |
| 10/13/1988 | DE3710359A1 Device for monitoring varistors integrated in a circuit |
| 10/11/1988 | US4777555 Device for protecting an electric power line against high transient overvoltages |
| 10/11/1988 | US4777375 Intrinsically safe matrix keypad having opto-couplers associated with each row and column of switches |
| 10/05/1988 | EP0284869A1 Power supply circuit using DC series supply |
| 09/28/1988 | EP0284592A1 Device allowing the restoration of the line courant in case of the burning out of one or several elements of a series arrangement |
| 09/21/1988 | EP0282506A1 A.c.-d.c. spike eliminating bandpass filter |
| 09/20/1988 | US4772979 Voltage shock protection circuit |
| 09/06/1988 | US4769752 Power supplies for electrical and electronic equipment |
| 09/06/1988 | US4769555 Multi-time delay power controller apparatus with time delay turn-on and turn-off |
| 09/01/1988 | DE3705865A1 Circuit arrangement for protecting an apparatus against overvoltages |
| 08/25/1988 | DE3704982A1 Electronic circuit for an intrinsically safe DC supply |
| 08/17/1988 | EP0278719A2 Solid state current limited power controller for DC circuits |
| 08/17/1988 | EP0278585A1 Packaged solid state surge protector |
| 08/09/1988 | US4763069 Diode safety barrier |
| 08/02/1988 | US4761705 Fault tolerant/failsafe current unit |
| 08/02/1988 | US4761702 CMOS latch-up recovery circuit |
| 07/27/1988 | EP0275960A2 Circuit arrangement for an inductive load |
| 07/26/1988 | US4760486 Protection device against flashover in a transmitter circuit |
| 07/26/1988 | US4760485 Zine oxide surge arresters |
| 07/26/1988 | US4760484 Inverter circuit |
| 07/19/1988 | US4758920 Telephone and data overvoltage protection apparatus |
| 07/19/1988 | US4758805 High frequency interference prevention filter for electric instruments |
| 06/30/1988 | DE3643622A1 Protection device on varistors |
| 06/29/1988 | EP0272514A1 Circuit arrangement for limiting the switch-on current and for overvoltage protection of switched power supply apparatuses |
| 06/23/1988 | DE3642625A1 Circuit arrangement for protecting electronic apparatuses against overloading |
| 06/22/1988 | EP0271993A2 Surge protection for telecommunications terminals |
| 06/21/1988 | US4752852 Controlling current flow from a voltage supply through a load |
| 06/15/1988 | EP0270828A1 Stimulator |
| 06/14/1988 | US4751449 Start from coast protective circuit |
| 06/09/1988 | DE3640661A1 Circuit arrangement for overvoltage protection of a thyristor in the blocking direction |
| 06/01/1988 | EP0269224A2 Thin film overvoltage protection device |
| 06/01/1988 | EP0268947A1 Protective device for the terminal equipment at a telephone subscriber's |
| 05/31/1988 | US4748541 Modular contact system for telephone cable head |
| 05/31/1988 | US4748534 Device for establishing between conductors a galvanic connection, which is blocked for the transmission of electromagnetic radiation |
| 05/31/1988 | US4748533 Integrated circuit for the protection of subscriber lines against overvoltages |
| 05/24/1988 | US4745923 Protection apparatus for patient-implantable device |
| 05/17/1988 | US4744369 Medical current limiting circuit |
| 05/10/1988 | US4743997 High-voltage systems surge eliminators for transmission lines and distribution station protection |
| 05/10/1988 | CA1236525A1 Alternating current limiting type semiconductor current circuit breaker |
| 05/04/1988 | CN87203813U Secondary open-circuit protector for ac mutual-inductor |
| 05/04/1988 | CN87107179A Large area fransducer array electrostatic disckarge protection circuit |
| 05/04/1988 | CN87106171A Circuit protector of communication line |
| 04/27/1988 | EP0265290A2 Electrostatic discharge protection network for large area transducer arrays |
| 04/26/1988 | US4740859 Transient voltage surge suppressor and line short monitor |
| 04/20/1988 | CN87106643A Excess current protective circuit of converter |
| 04/19/1988 | US4739436 Surge suppression circuit |
| 04/13/1988 | EP0263343A2 Power transistor with self-protection against direct secondary breakdown |
| 04/13/1988 | CN87203635U Multi-function over voltage protector of house electrical equipment |
| 04/13/1988 | CN87203055U Resonance dispel apparatus of iolle work compensate lack phase for power distribute transformer |
| 04/13/1988 | CN87202097U Safety apparatus for not power cut and using power |
| 04/07/1988 | DE3632598A1 Component consisting of at least one NTC thermistor and of at least one PTC thermistor |
| 04/07/1988 | DE3632224A1 Device for monitoring varistors which are integrated in a circuit |
| 04/05/1988 | US4736138 Apparatus for limiting surge currents in dc-illuminated incandescent lamp |
| 04/05/1988 | CA1234864A1 Device for regulating ac current circuit |
| 03/31/1988 | DE3633271A1 Circuit arrangement for the protection of low-resistance outputs |
| 03/30/1988 | EP0261939A2 Circuit protection device |
| 03/30/1988 | EP0261938A2 Circuit protection device |
| 03/30/1988 | EP0261937A2 Circuit protection device |
| 03/24/1988 | DE3631177A1 Device for protection against overvoltages in electrical equipment |
| 03/23/1988 | EP0260839A2 Protection arrangements for communications lines |
| 03/22/1988 | US4733326 Protective arrangement for an electromagnetic load |
| 03/17/1988 | DE3630604A1 Starting control circuit |
| 03/10/1988 | WO1988001800A1 A.c.-d.c. spike eliminating bandpass filter |
| 03/10/1988 | DE3722286A1 Jump lead cable |
| 03/09/1988 | EP0259180A2 Circuit protection device |
| 03/09/1988 | EP0259179A2 Overvoltage protection device |
| 03/09/1988 | EP0259178A2 Circuit protection arrangement |
| 03/09/1988 | EP0259177A2 Circuit protection arrangement |
| 03/09/1988 | EP0259176A2 Circuit protection arrangement |
| 03/09/1988 | EP0258776A2 Starting aid cable |
| 03/01/1988 | US4729055 Surge protection element for telephone lines, or data transmission lines or the like |
| 03/01/1988 | US4729052 Supervisory system for impedance-earthed power systems |
| 02/23/1988 | US4727350 Surge absorber |
| 02/23/1988 | US4727292 High voltage power supply fault isolation system |
| 02/16/1988 | US4725739 AC branch power distribution filter |
| 02/11/1988 | DE3626800A1 Arrangement for protection against overvoltages |
| 02/10/1988 | CN86205001U Single phase ac overload limitor with thyristors |
| 02/09/1988 | US4724374 Solid state current limited power controller for DC circuits |
| 02/02/1988 | US4723188 Permanent magnet surge arrestor for DC power converter |
| 02/02/1988 | CA1232319A1 Protective means for series capacitors |