| Patents for H01F 38 - Adaptations of transformers or inductances for specific applications or functions (13,550) |
|---|
| 04/25/1990 | EP0364725A1 Rotating transformer for a recorder |
| 04/17/1990 | US4918419 Ignition coil for engine |
| 04/17/1990 | US4918418 Inductive coil structure with electrical return path |
| 04/10/1990 | US4916363 For a fluorescent lamp |
| 04/05/1990 | WO1990003697A1 Data current coupler and methods of making and assembling same |
| 04/03/1990 | US4914385 Protective devices |
| 03/27/1990 | US4912735 Power transfer apparatus particularly for CT scanner |
| 03/21/1990 | EP0242354B1 Ignition device with a high voltage connection |
| 03/21/1990 | CN1007312B Internal armature current monitoring in large three-phase generator |
| 03/20/1990 | US4910488 Rotary variable differential transformer with eccentric rotor core |
| 03/20/1990 | US4910482 AC line filter |
| 03/14/1990 | EP0358470A1 Inductive coupler |
| 03/14/1990 | EP0357829A1 Non-contacting power supplying system |
| 03/08/1990 | WO1990002261A1 Ignition circuit with interference suppression |
| 03/07/1990 | EP0356661A2 Regulated power supply with a high-voltage generator for a television set |
| 03/01/1990 | DE3928223A1 Magnetic device for HV pulse generator |
| 02/28/1990 | EP0356248A1 A current sensor |
| 02/28/1990 | EP0356090A2 Fibre optic data coupler |
| 02/28/1990 | EP0355145A1 Device for injecting an electromagnetic signal into an electric lead |
| 02/28/1990 | CN1007024B Internal common neutral bus in large three-phase generator |
| 02/27/1990 | US4904879 Data current coupler and methods of making and assembling same |
| 02/27/1990 | US4903675 Internal combustion engine ignition apparatus having a primary winding module |
| 02/27/1990 | US4903674 Spark developing apparatus for internal combustion engines |
| 02/27/1990 | CA1266300A1 Watchdog circuit for transmission line sensor module |
| 02/22/1990 | WO1990001781A1 Inductive coil structure |
| 02/22/1990 | DE3827856A1 Method and arrangement for monitoring an electric line |
| 02/20/1990 | US4902942 Controlled leakage transformer for fluorescent lamp ballast including integral ballasting inductor |
| 02/13/1990 | US4901213 Five-legged core type frequency triplo-multiplier |
| 02/13/1990 | US4901010 Current-measuring device |
| 02/07/1990 | EP0354079A1 Current transformer for continuous, alternative or pulsed current |
| 02/07/1990 | EP0353847A2 Dwell control circuit for ignition apparatus |
| 01/31/1990 | EP0353136A1 Transformer frame and transformer having such a frame |
| 01/31/1990 | EP0352592A1 Current supply apparatus for electronic devices |
| 01/31/1990 | EP0352453A1 Ignition coil |
| 01/30/1990 | US4897627 Fluorescent ballast assembly including a strip circuit board |
| 01/30/1990 | CA1265217A1 Molded case circuit breaker current transformer with spiral bus |
| 01/24/1990 | EP0351583A1 Twin coil |
| 01/17/1990 | EP0350767A1 Audio winding bridging an air gap |
| 01/17/1990 | CN1006501B Inductance adjustment for transformers |
| 01/16/1990 | US4894610 Current-transformer arrangement for an electrostatic meter |
| 01/10/1990 | EP0350255A1 Improved circuit transformer |
| 01/09/1990 | US4893105 Transformer with tapered core |
| 01/09/1990 | US4893069 Ferroresonant three-phase constant AC voltage transformer arrangement with compensation for unbalanced loads |
| 01/09/1990 | CA1264359A1 High-voltage current transformer and method of manufacturing |
| 01/04/1990 | DE3822284A1 High-voltage transformer |
| 12/28/1989 | DE3821284A1 Transformer for a switched-mode power supply, or the line output stage in a television receiver |
| 12/27/1989 | EP0348193A2 Epoxy resin composition |
| 12/20/1989 | EP0347304A1 Electric measuring transformer |
| 12/13/1989 | CN1006110B Subminiature current transformer |
| 12/12/1989 | US4887061 Transformer for a flyback type converter |
| 12/12/1989 | US4887029 Mutual inductance current transducer, method of making and electric energy meter incorporating same |
| 11/29/1989 | CN1005931B Measuring transformer for measuring current flowing in electrical conductor |
| 11/23/1989 | EP0343099A1 Wound current transformer |
| 11/23/1989 | DE3816135A1 Electronic coupling for robots and automatic handling machines |
| 11/21/1989 | CA1263159A1 Oscillating flux transformer |
| 11/02/1989 | WO1989010651A1 Electric transmission device |
| 11/02/1989 | WO1989010621A1 Matrix transformer having high dielectric isolation |
| 11/02/1989 | EP0340083A1 Ignition coil for internal combustion engines of automobile vehicles and process of fabrication |
| 11/02/1989 | EP0339892A2 Ignition coil-incorporated distributor for internal combustion engines |
| 11/02/1989 | EP0339189A1 Current transformer for electric energy meter and method of making the transformer |
| 10/24/1989 | CA1262479A1 Crt focus tracking arrangement |
| 10/19/1989 | WO1989009994A1 Saturable inductor and transformer structures for magnetic pulse compression |
| 10/18/1989 | CN1036477A High-voltage voltage transformer |
| 10/17/1989 | US4874990 Notch gap transformer and lighting system incorporating same |
| 10/12/1989 | DE3810431A1 Selbstgefuehrter gegentakt-wechselrichter Self-Guided balanced-inverter |
| 10/05/1989 | WO1989009510A1 Automatically guided push-pull inverter |
| 10/05/1989 | DE3810313A1 Line transformer for a television receiver |
| 10/05/1989 | DE3810037A1 Magnetic recording and reproducing apparatus |
| 10/04/1989 | EP0335511A1 Active current transformer |
| 10/04/1989 | EP0335142A1 Transformer for switching network |
| 09/26/1989 | CA1260087A1 Current-transformer arrangement for a static electricity meter |
| 09/20/1989 | EP0333388A2 Power transfer circuit including a sympathetic resonator |
| 09/19/1989 | US4868732 Pluggable power system having magnetic flux coupled power transformer and inductive filter components |
| 09/19/1989 | CA1259678A1 High voltage measurement transformer for suspension from a high voltage switching apparatus |
| 09/12/1989 | US4866409 Resin-crack prevented high-voltage transformer |
| 09/05/1989 | US4864223 Measuring transformer to measure the current flowing in an electric conductor |
| 08/24/1989 | WO1989007828A1 Choke coil |
| 08/22/1989 | US4860187 Magnetic flux coupled voltage multiplication apparatus |
| 08/17/1989 | DE3903587A1 Koaxialer induktiver verbinder Coaxial connectors inductive |
| 08/17/1989 | DE3803846A1 High-voltage test transformer having insulated core segments |
| 08/15/1989 | US4858098 Split-diode high-voltage transformer |
| 08/15/1989 | US4858095 Magnetron drive apparatus |
| 08/03/1989 | DE3900286A1 Transformer |
| 08/03/1989 | DE3802661A1 Programming and testing device |
| 08/02/1989 | EP0238524B1 Current transformer for a static electricity counter |
| 07/27/1989 | WO1989006860A1 Transformer |
| 07/27/1989 | WO1989006805A1 Device for injecting an electromagnetic signal into an electric lead |
| 07/19/1989 | EP0324084A2 High-voltage transformer for television sets |
| 07/12/1989 | EP0323614A2 Rotable contactless antenna coupler and antenna |
| 07/06/1989 | DE3744122A1 Reversed transformer |
| 07/04/1989 | US4845453 High-voltage voltage transformer with shields |
| 07/04/1989 | CA1256957A1 Transformer assembly and winding therefor |
| 07/04/1989 | CA1256956A1 Inductance adjustment for transformers |
| 06/27/1989 | US4843362 Ignition coil for internal combustion engine |
| 06/21/1989 | EP0321416A1 Ignition coil |
| 06/20/1989 | US4841237 Current-measuring device |
| 06/20/1989 | US4841201 Display device including flyback transformer constructed to control leakage currents |
| 06/15/1989 | DE3741033A1 High-voltage transformer, and a method for its production |
| 06/13/1989 | US4838797 Underwater connect and disconnect plug and receptacle |
| 06/08/1989 | DE3738907A1 Instrument transformer (measurement transformer, measurement transducer) and associated electric-shock protection cap |