| Patents for H01F 38 - Adaptations of transformers or inductances for specific applications or functions (13,550) |
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| 06/07/1989 | EP0318695A2 Magnetron drive apparatus |
| 06/07/1989 | EP0318613A1 High-voltage transformer and method for making same |
| 06/06/1989 | US4837556 Signal transmission device |
| 06/06/1989 | US4836175 Ignition system dwell control |
| 06/06/1989 | US4835841 Method of making a coil assembly |
| 05/30/1989 | US4835431 Transformer and synchronous machine with stationary field winding |
| 05/30/1989 | US4834056 Ignition coil unit for internal combustion engines |
| 05/24/1989 | EP0317043A1 Mounting an electromagnetic coil on an armature |
| 05/24/1989 | DE3738604A1 Apparatus for sampling electrical signals |
| 05/23/1989 | US4833432 Saturable reactor for use in self-convergence system fo deflection yoke |
| 05/23/1989 | US4833337 Inductive coupled power system |
| 05/23/1989 | US4831995 Integrated ignition-transformer assembly for the cylinder of a controlled ignition heat engine |
| 05/18/1989 | DE3736170A1 Device for contact-free transmission of power, using electricity |
| 05/17/1989 | EP0315835A1 High-voltage potential tranformer |
| 05/10/1989 | CN1032880A 旋转变压器 Resolver |
| 05/09/1989 | US4829401 Rotating transformer with foil windings |
| 05/03/1989 | EP0314287A1 Pluggable power system having magnetic flux coupled power transformer and inductive filter components |
| 05/03/1989 | EP0314222A1 Electric energy transmission device |
| 05/03/1989 | DE3830329A1 Double ignition coil, especially for a motor vehicle combustion engine, as well as a conductive circuit of the primary windings for such a coil |
| 05/02/1989 | US4827360 Rotary transformer with winding to cancel crosstalk |
| 05/02/1989 | US4825844 Ignition system for an internal combustion engine |
| 04/26/1989 | EP0313139A1 Rotating transformer |
| 04/25/1989 | US4825166 Nonmagnetic alloy welded to magnetic permalloy; magnetic strip wrapped around bobbin |
| 04/25/1989 | US4825154 Current probe |
| 04/25/1989 | US4825129 Video display apparatus |
| 04/24/1989 | EP0287645A4 Inductive coupled power system. |
| 04/18/1989 | US4823074 Low power consumption current transducer |
| 04/13/1989 | DE3733458A1 Line transformer for a television receiver (television set) |
| 04/13/1989 | DE3733376A1 Method for producing a coaxially field-coupled transformer |
| 04/12/1989 | EP0015905B2 Combined current and voltage transformers for a high voltage installation enclosed in a metal envelope filled with pressure gas |
| 04/06/1989 | DE3732382A1 Transformer |
| 03/09/1989 | DE3729051A1 Ignition coil |
| 03/07/1989 | US4810989 Transformer system for measuring electrical current |
| 03/07/1989 | US4810899 High-voltage connection device, especially for a high-voltage transformer, without lead-out cables and with detachable potentiometer set |
| 02/28/1989 | US4808916 Power supply magnetic shunt for transmission line sensor module |
| 02/28/1989 | US4808910 High voltage measurement transformer for suspension from a high voltage switching apparatus |
| 02/22/1989 | EP0304038A2 Ignition unit for combustion engines |
| 02/22/1989 | EP0304037A2 Ignition system for combustion engines |
| 02/21/1989 | US4806894 Apparatus for cancelling leakage magnetic field |
| 02/16/1989 | DE3826054A1 Ignition coil, especially for a motor vehicle internal combustion engine, and a heat sink for such a coil |
| 02/14/1989 | CA1250018A1 Controlled inductive coupling device |
| 02/09/1989 | WO1989000975A1 Ozone generating apparatus |
| 02/07/1989 | US4803454 Ignition coil |
| 02/02/1989 | DE3724349A1 Rotary transformer for a recorder |
| 01/31/1989 | US4802080 Power transfer circuit including a sympathetic resonator |
| 01/25/1989 | EP0300075A1 Current detector |
| 01/24/1989 | US4800328 Inductive power coupling with constant voltage output |
| 01/18/1989 | EP0299498A1 Magnetic core and method of producing same |
| 01/18/1989 | EP0299052A1 Bobbin for a magnetic sensor |
| 01/17/1989 | CA1249040A1 Rotary coupler |
| 01/12/1989 | DE3721864A1 High-reactance transformer (high-leakage-reactance transformer) |
| 01/04/1989 | EP0297487A1 Transformer |
| 01/03/1989 | US4795959 For converting AC)power to an output |
| 12/27/1988 | US4794487 Heat protection casing |
| 12/27/1988 | US4794326 Transducer for current measurements |
| 12/27/1988 | US4794318 Current transducer arrangement for outdoor high-voltage installations |
| 12/08/1988 | DE3817892A1 Insulating high-voltage transformer for a video device |
| 12/06/1988 | CA1246244A1 Device for varying an electrode voltage for a cathode- ray tube |
| 12/06/1988 | CA1246146A1 Dual current transformer current sensing method and sensor |
| 12/01/1988 | DE3715789A1 Electrically isolated current transformer for measuring DC and AC currents |
| 11/30/1988 | EP0292636A1 Current converter for measuring the current flowing in an electric conductor |
| 11/30/1988 | EP0292509A1 Demountable fixing system for ignition coils in internal combustion engines |
| 11/24/1988 | DE3715528A1 Current monitoring circuit with inductive converters |
| 11/23/1988 | EP0291575A2 Horizontal deflection transformer |
| 11/22/1988 | US4786862 Watchdog circuit for transmission line sensor module |
| 11/17/1988 | EP0290951A2 Current converter circuit |
| 10/26/1988 | EP0287645A1 Inductive coupled power system. |
| 10/20/1988 | EP0285604A4 Current transformers. |
| 10/19/1988 | EP0286980A1 High-voltage transformer |
| 10/12/1988 | EP0286095A1 Inductive energy supply device for electric circuit mounted on a rotative shaft |
| 10/12/1988 | EP0285604A1 Current transformers |
| 10/11/1988 | US4777466 Connector arrangement for electrical circuits in underwater installations, and transformer particularly for use in such arrangement |
| 10/04/1988 | US4775849 Gas insulated current transformer |
| 10/04/1988 | US4775848 High-voltage valve reactor, specifically for high-voltage direct-current transmission systems |
| 09/21/1988 | EP0283354A1 Electric transformer, particularly for an ignition coil of an internal combustion engine |
| 09/13/1988 | US4771257 Ballast transformer with bobbins coils |
| 09/07/1988 | WO1988006783A1 Magnetic tape recorder with device for non-contact transmission of signals between two component parts moving in relation to each other |
| 08/31/1988 | EP0280624A1 Device to position a magnetic circuit in relation to a coil of a high-tension transformer |
| 08/31/1988 | EP0280444A1 Electromagnetic contactor with lightweight wide range current transducer |
| 08/24/1988 | EP0279596A1 Electromagnetic contactor with lightweight wide range current transducer with sintered powdered metal core |
| 08/24/1988 | EP0279253A1 Ballast device for gas discharge lamps |
| 08/23/1988 | US4766406 Fluorescent ballast assembly |
| 08/18/1988 | DE3703561A1 Inductive component |
| 08/16/1988 | US4764744 Overload relay having adjustably gapped current transformers |
| 08/10/1988 | EP0277169A1 Rotary signal coupler |
| 08/09/1988 | US4763094 Ignition coil assembly for internal combustion engines |
| 08/02/1988 | US4761724 Transformer coupling for transmitting direct current through a barrier |
| 07/28/1988 | WO1988005545A1 Bobbin for a magnetic sensor |
| 07/26/1988 | CA1239669A1 Inductive electric connector |
| 07/12/1988 | CA1239199A1 Transformer winding arrangement for a television apparatus |
| 07/07/1988 | DE3644553A1 Gas-insulated high-voltage current transformer |
| 06/29/1988 | EP0272289A1 Ignition coil for ignition systems of internal combustion engines. |
| 06/28/1988 | US4754180 Forceless non-contacting power transformer |
| 06/07/1988 | US4749939 Measuring transformer for measuring of a current flowing in an electrical conductor |
| 06/01/1988 | EP0269074A1 Line transformer |
| 05/31/1988 | US4748430 Air-cooled high-frequency current transformer |
| 05/31/1988 | US4747206 Method of producing electrical coil units, particularly for ignition apparatus |
| 05/24/1988 | US4746891 High saturation three coil current transformer |
| 05/24/1988 | US4746890 Mounting for ignition module |
| 05/18/1988 | EP0267595A1 Power supply magnetic shunt for transmission line sensor module |