| Patents for H01F 38 - Adaptations of transformers or inductances for specific applications or functions (13,550) |
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| 04/14/1992 | US5105146 Current sensor and method for determining the current flow in conductors to be evaluated |
| 04/14/1992 | US5105128 Focusing unit |
| 04/07/1992 | US5103201 Switching mode power transformer |
| 04/07/1992 | US5101803 Ignition coil |
| 03/18/1992 | EP0475738A2 Moulded electrical apparatus |
| 03/18/1992 | EP0475079A1 Flyback transformer |
| 03/18/1992 | EP0474640A1 Ignition integrated system for internal combustion motors |
| 03/17/1992 | CA1297546C Ferroresonant transformer with dual outputs |
| 03/11/1992 | EP0474298A1 Rotary transformer |
| 03/04/1992 | EP0473336A2 Data current coupler |
| 03/04/1992 | EP0472961A2 Coding method for increasing compressing efficiency of data in transmitting or storing picture signals |
| 02/18/1992 | CA1296075C Bobbin for a magnetic sensor |
| 02/11/1992 | CA1295702C Rotating transformer |
| 02/05/1992 | EP0469530A1 Ignition coil assembly directly coupled to ignition plug for internal combustion engine |
| 01/22/1992 | EP0466707A1 Welding apparatus and transformer therefor |
| 01/14/1992 | US5081335 Miniature welding apparatus |
| 01/08/1992 | EP0464924A1 High voltage transformer, particularly for an X-ray apparatus |
| 01/07/1992 | US5079687 Multi-stage insulating transformer type high voltage generating apparatus having a connection structure |
| 01/07/1992 | US5079462 Brushless electrical power generator with reduced harmonics |
| 01/02/1992 | EP0287645B1 Inductive coupled power system |
| 12/27/1991 | EP0428669A4 High efficiency, high output, compact cd ignition coil |
| 12/19/1991 | DE4019241A1 Energy and signal transmission system - for transmitting measurement signals from vehicle tyres |
| 12/18/1991 | EP0252141B1 Magnetic circuit device provided with a current coil |
| 12/12/1991 | WO1991019305A1 A method and a shield for shielding a current transformer as well as a current transformer including such a shield |
| 12/11/1991 | EP0459992A1 Method and high voltage increaser device for i.c. combustion motors |
| 12/03/1991 | US5070293 Electric power transmitting device with inductive coupling |
| 11/28/1991 | DE4116871A1 Microwave oven for use with AC or DC power supply - uses DC=AC converter between DC battery and frequency transformer |
| 11/27/1991 | EP0458755A1 Coil ignition unit for an internal combustion engine |
| 11/27/1991 | EP0458482A2 Horizontal sweep circuit for a cathode ray tube device |
| 11/26/1991 | US5068557 Generator with bearing-retaining stator |
| 11/26/1991 | CA1292561C Isolating high voltage transformers for video apparatus |
| 11/12/1991 | US5065186 Magnetic emissions reduction apparatus and method |
| 11/06/1991 | CN1014660B Amplitude coil for final cascade of line scanning of television set |
| 11/04/1991 | CA2039036A1 Magnetic emissions reduction apparatus and method |
| 10/30/1991 | EP0454598A1 Integrated unit comprising an ignition coil and a plug for the individual controlled ignition in an internal combustion engine |
| 10/30/1991 | EP0453518A1 Current transformer arrangement for three-wire three-phase systems, especially to detect the actual current for controlled dc consumers powered via current rectifiers. |
| 10/29/1991 | US5060624 Engine ignition system including a transformer assembly and positioning means therefor |
| 10/22/1991 | US5060128 Flyback power supply |
| 10/22/1991 | US5059910 Optical transformer |
| 10/22/1991 | US5059876 Brushless rotating electrical machine |
| 10/16/1991 | EP0451628A1 Choke-coil/transformer combination for operating high pressure metal vapor lamps of vehicle electrical systems |
| 10/16/1991 | CN1014370B Rotating transformer |
| 10/03/1991 | WO1991015022A1 Cable coupling transformer |
| 10/02/1991 | EP0448596A1 Ignition electronic device for endothermic motors of small size |
| 10/01/1991 | US5053738 Magnetic leakage transformer |
| 10/01/1991 | US5053737 Low tension connecting structure for an ignition coil, in particular for an internal combustion engine of an automotive vehicle |
| 10/01/1991 | US5053599 Welding gun assembly with transformers |
| 10/01/1991 | US5053476 Epoxy resin composition based on bisphenol epoxy, polyetherpolyol, anhydride and imidazole |
| 10/01/1991 | US5052941 Inductive-coupling connector for a well head equipment |
| 10/01/1991 | CA1290014C Ferroresonant three-phase constant ac voltage transformer |
| 09/18/1991 | EP0446837A1 Feed-through transformer |
| 09/11/1991 | EP0445557A1 Ignition coil for internal combustion engine |
| 09/04/1991 | EP0444522A1 Coil device |
| 09/04/1991 | EP0444521A1 Coil device |
| 09/03/1991 | US5046186 Rotating x-ray tube |
| 09/03/1991 | US5044328 Ignition device for internal combustion engine |
| 08/20/1991 | US5041807 High tension connection for an ignition coil, in particular for an internal combustion engine for an automotive vehicle |
| 08/14/1991 | EP0440865A1 Electrical insulation |
| 08/13/1991 | US5038745 Ignition unit for internal combustion engines |
| 08/08/1991 | DE4001840A1 Road vehicle discharge lamp supply transformer - has secondary winding stages coupled in series for voltage summation |
| 08/07/1991 | WO1991012107A1 Welding apparatus and transformer therefor |
| 08/07/1991 | CA2050581A1 Welding apparatus and transformer therefor |
| 08/06/1991 | US5036827 Ignition coil-incorporated distributor for internal combustion engines |
| 07/31/1991 | EP0438616A1 Current-voltage transformer for domestic electronic power meters |
| 07/30/1991 | US5036418 Magnetic tape recorder with shielding device for contact-free signal transfer between components moved relative to one another |
| 07/24/1991 | CA2034636A1 Current-voltage transformer for electronic house-service meter |
| 07/17/1991 | EP0250445B1 Ignition system for internal combustion engines |
| 07/16/1991 | US5032814 Mounting assembly for an ignition coil, in particular for an internal combustion engine of an automotive vehicle |
| 07/11/1991 | DE4100272A1 Oscillator current supply for portable data appts. - delivers energy to primary coil with electromagnetically coupled detector coil for load change pick=up |
| 07/09/1991 | US5030813 Welding apparatus and transformer therefor |
| 06/26/1991 | EP0433752A1 Inductive coupler for transfer of electric energy |
| 06/20/1991 | DE3937828C1 Ignition coil for IC engine - has two opposite-facing side walls of housing with orifices which serve as entrance for magnetic core |
| 06/19/1991 | CN1052406A Focusing unit |
| 06/18/1991 | US5025241 Transformer of ferrite closed magnetic circuit type |
| 06/12/1991 | EP0432026A1 Low-voltage connector for ignition coil, particularly for internal combustion engine for motor vehicle |
| 06/12/1991 | EP0431322A1 Ignition coil |
| 06/11/1991 | US5023768 High voltage high power DC power supply |
| 06/11/1991 | US5023734 Cylindrical rotary transducer |
| 06/06/1991 | DE4037407A1 Clip-on transformer giving improved measuring repeatability - uses self-aligning interlocking joints in toroidal core |
| 06/05/1991 | EP0430145A1 Magnetic leakage transformer |
| 05/29/1991 | EP0428669A1 High efficiency, high output, compact cd ignition coil |
| 05/25/1991 | CA2030582A1 High voltage high power dc power supply |
| 05/22/1991 | EP0427719A1 Inductive coil structure |
| 05/16/1991 | DE4035163A1 Ignition coil for IC engine - has coils pre-mounted in housing with apertures in two sidewalls for insertion of magnetic core |
| 05/14/1991 | US5015984 Ignition coil, in particular for an internal combustion engine of an automotive vehicle, and means for retaining the primary assembly within the secondary assembly of such a coil |
| 05/14/1991 | US5015983 Compact circuit interrupter having multiple ampere ratings |
| 05/14/1991 | US5015982 Ignition coil |
| 05/07/1991 | US5014346 Rotatable contactless antenna coupler and antenna |
| 04/30/1991 | US5012179 Flyback transformer with integrally formed resonance capacitor |
| 04/18/1991 | WO1991005355A1 High frequency matrix transformer power converter module |
| 04/16/1991 | US5008643 Ignition coil having a divided high tension winding, in particular for internal combustion engines |
| 04/16/1991 | US5008612 Current sensor |
| 04/16/1991 | US5007697 Fibre optic data coupler |
| 04/10/1991 | CN1012331B High voltage current transformer and method of mfr therrof |
| 04/09/1991 | US5006764 Fluorescent lamp ballast with end connector |
| 04/04/1991 | WO1991004564A1 Device for inductively connecting two-wire leads |
| 04/04/1991 | WO1991004411A1 Ignition coil |
| 04/02/1991 | US5004974 Electric current sensing device |
| 04/02/1991 | US5003959 Ignition coil unit for an internal combustion engine |
| 03/28/1991 | DE3930587A1 Zuendspule Ignition Coil |