| Patents for H02H 9 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection (21,232) |
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| 01/22/1992 | CN2094129U Arrester for electric transmission line |
| 01/21/1992 | US5083232 Fault current limiter |
| 01/16/1992 | DE4022253A1 Current limiting circuit for telecommunication installation - couples source electrodes of two FETs via resistance |
| 01/15/1992 | EP0466619A1 Overvoltage protection device |
| 01/14/1992 | CA1294325C Switch mode power supply protective circuit arrangement |
| 01/09/1992 | DE4019592A1 Inrush alternating current limitation for inductive load switching |
| 01/08/1992 | EP0464679A2 Superconducting AC current limiter equipped with quick-recoverable trigger coils |
| 01/08/1992 | CN2092827U Safety device being able to auto-recovering power supply |
| 01/02/1992 | DE4020646A1 Overvoltage protection device for electric load - has two temp. switches within diverter path and at output of protection device |
| 01/02/1992 | DE4020517A1 DC supply circuit for gas discharge lamp - uses choke coil infront of full-wave rectifier and output smoothing capacitor |
| 01/01/1992 | CN2092135U Communication security device using thermistor with positive temp coefficient |
| 12/31/1991 | US5077675 Power-on-concurrent maintenance |
| 12/31/1991 | US5077651 Snubber circuit of power converter |
| 12/31/1991 | US5077630 Integrated services digital network terminating resistor with line fault protector |
| 12/27/1991 | EP0462694A2 Protective device for temporary system overvoltages |
| 12/26/1991 | WO1991020116A1 Low impedance power conditioner apparatus and method |
| 12/25/1991 | CN2091503U Voltage-stabilizing saving temp.-adjusting protector for refrigerator |
| 12/22/1991 | CA2040163A1 Protective device for temporary system overvoltages |
| 12/18/1991 | EP0462025A1 Disconnectable surge arrester for low-voltage installations |
| 12/11/1991 | EP0461054A1 Method and device for limiting overcurrents in an electrical circuit |
| 12/10/1991 | US5072328 Power control relay for electrical outlets which maintains position in absence of solenoid energization |
| 12/10/1991 | US5072327 Electronic protection device for use with a fuse mount |
| 12/10/1991 | US5072271 Protection circuit for use in semiconductor integrated circuit device |
| 12/04/1991 | EP0458798A1 Current control circuit. |
| 12/02/1991 | CA2042485A1 Process for limiting overload based on pwm (or lc3) control technique and electronic device for implementing such process |
| 11/26/1991 | CA1292503C Surge protector for telecommunications terminals |
| 11/26/1991 | CA1292502C Packaged solid state primary surge protector |
| 11/21/1991 | DE4015816A1 Cable loom with connector contg. current-responsive resistors - in form of carbon filled polymer films whose resistance is increased by overcurrent |
| 11/20/1991 | CN1056391A Overvoltage and overcurrent protective circuit with high earth balance |
| 11/19/1991 | US5067045 Output protection scheme for unipolar constant current source |
| 11/14/1991 | WO1991017597A1 Process and device for reducing the inrush current when powering an inductive load |
| 11/14/1991 | DE4015301A1 Overvoltage protection indicator for electrical plants - has safety output devices in branches from phase lines to varistors unit with remote signalling relays |
| 11/13/1991 | EP0456624A1 Overvoltage and overcurrent protective circuit |
| 11/11/1991 | WO1991017492A1 Ac power conditioning circuit |
| 11/08/1991 | WO1991017598A1 An overvoltage and overcurrent protective circuit with high earth balance |
| 11/08/1991 | CA2078696A1 Overvoltage and overcurrent protective circuit with high earth balance |
| 11/07/1991 | DE4013888A1 Inrush alternating current limiter for inductive power supply - uses measured prim. winding current to adjust triac firing to different phases in successive half-cycles |
| 11/05/1991 | US5063472 Device for detecting superconductor quenching and application to a superconducting current limiter |
| 11/05/1991 | US5063303 Soft start circuit |
| 10/31/1991 | WO1991016752A1 A circuit protection device |
| 10/31/1991 | DE4013731A1 Switching current transient limiting circuit - uses source drain path of MOSFET as serial current limiting resistance |
| 10/29/1991 | CA1291531C Ac branch power distribution filter |
| 10/25/1991 | CA2040983A1 Hybrid current limiter |
| 10/22/1991 | CA1291207C Auto-reset circuit breaker |
| 10/16/1991 | CN1014381B Large area fransducer array electrostatic disckarge protection circuit |
| 10/09/1991 | CN2086470U Using electricity protector with lightning arrester |
| 10/08/1991 | US5055961 Flyback current dampening apparatus |
| 10/03/1991 | WO1991015046A1 Power line filter and surge protection circuit components and circuits |
| 10/02/1991 | EP0449262A1 Integrated services digital network terminating resistor with line fault protector |
| 10/02/1991 | EP0448864A2 Protection circuit for detachable operating unit used in audio device |
| 10/01/1991 | US5053910 Surge suppressor for coaxial transmission line |
| 10/01/1991 | CA1290024C Protection apparatus for patient-implantable device |
| 09/29/1991 | CA2039237A1 Integrated services digital network terminating resistor with line fault protector |
| 09/29/1991 | CA2018339A1 Grounding detection circuit |
| 09/19/1991 | DE4107459A1 Overload voltage protection for data cable - has conductor elements with different response times |
| 09/19/1991 | DE4106505A1 Over voltage protection appts. for house-connected data lines - has conductive paths to effect discharge to ground e.g. from lightning |
| 09/18/1991 | EP0446724A2 Current limiting method and apparatus |
| 09/17/1991 | US5050060 Intrinsically safe power supply unit |
| 09/05/1991 | WO1991013483A1 Overcurrent protective circuit |
| 09/04/1991 | EP0444569A1 Device for protection against transients on the DC-voltage generated by the connection or disconnection of an electronic assembly to the supply source |
| 09/04/1991 | EP0444484A2 Circuit for overvoltage protection |
| 09/03/1991 | US5045963 Protective circuit for the induction coil of a magnetically inductive flow meter |
| 09/03/1991 | US5045771 Method and circuit for preventing transients from damaging a switching regulator |
| 09/03/1991 | CA1288463C Surge protection device |
| 08/29/1991 | DE4005815A1 Current limiting device for electronically switched load - uses voltage drop across measuring resistance to control switching transistor |
| 08/29/1991 | CA2037125A1 Electronic assembly protection device against disturbance caused by the connextion to a continuous electric power source or the disconnection fom the said source |
| 08/22/1991 | WO1991012643A1 Device for motor and short-circuit protection |
| 08/21/1991 | EP0442391A2 Circuit arrangement for protecting an input of an integrated circuit fed from a supply voltage source from overvoltages |
| 08/20/1991 | US5041889 Monolithically integratable transistor circuit for limiting transient positive high voltages, such as ESD pulses caused by electrostatic discharges on electric conductors |
| 08/20/1991 | US5041777 Voltage controlled and current limited power supply |
| 08/14/1991 | EP0441722A1 Disconnectable surge arrestor for low voltage power distribution network |
| 08/14/1991 | EP0440605A1 Electronic appliance |
| 08/14/1991 | CN2082914U Rectification device for excitation of brushless generator |
| 08/14/1991 | CN2082908U Secondary circuit disconnection protective device of current transformer |
| 08/14/1991 | CN1053868A Circuit protection arrangement |
| 08/08/1991 | WO1991011840A1 Circuit protection arrangement |
| 08/08/1991 | WO1991011732A1 Method and device for radio-navigational determinations using artificial earth-satellites |
| 08/07/1991 | CN2082481U Contactless controlled limiting electric device |
| 08/07/1991 | CN1053721A Subminiature extending protector for communication exchange |
| 08/06/1991 | US5038245 Method and apparatus for suppressing electrical transients |
| 07/30/1991 | US5036420 Surge absorber |
| 07/30/1991 | CA1287103C Cmos latch-up recovery circuit |
| 07/25/1991 | DE4016574A1 Terminal voltage limiter for three=phase alternator - uses overvoltage-dependent switch for automatic disconnection of exciter winding |
| 07/25/1991 | DE4001576A1 Overvoltage protection socket - has varistors in shallow recess and thermal coupling to fuse which is ruptured by overheating to break circuit connection |
| 07/23/1991 | US5034845 Integrated circuit apparatus including static electricity protection circuit |
| 07/23/1991 | CA1286812C Telephone and data overvoltage protection apparatus |
| 07/17/1991 | CN2081167U Essencial guard grating |
| 07/17/1991 | CN2081159U Safety socket for preventing electric shock |
| 07/16/1991 | US5032946 Electrical surge suppressor and dual indicator apparatus |
| 07/09/1991 | US5031066 DC isolation and protection system and circuit |
| 07/09/1991 | US5030844 DC power switch with inrush prevention |
| 07/09/1991 | CA1285983C Telephone subscriber loop overvoltage protection integrated circuit |
| 07/03/1991 | EP0434963A2 Compensation circuit for very vast current variations |
| 07/03/1991 | EP0403643A4 Uniform current and voltage distribution device |
| 07/02/1991 | US5029038 Dual resistance bus connector |
| 07/02/1991 | US5028809 Computer bus structure permitting replacement of modules during operation |
| 06/27/1991 | WO1991009440A1 Current control circuit |
| 06/27/1991 | DE3942480A1 Module with leading supply contacts - has time delay circuit between power supply and load activated on plugging in |
| 06/26/1991 | EP0433329A1 Apparatus suitable for use in protecting electrical installations from transients. |
| 06/25/1991 | US5027250 Electronic circuit with a protection device against fluctuations in the supply battery voltage |