| Patents for H01F 27 - Details of transformers or inductances, in general (43,362) |
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| 03/30/1988 | EP0261796A1 Longitudinally contoured conductor for inductive electrical devices |
| 03/30/1988 | EP0261707A1 Measuring circuit for continuous, accurate measurement of direct and alternating current |
| 03/29/1988 | US4733974 Transformer life consumption indicator |
| 03/24/1988 | WO1988002177A1 Formed metal core blocking |
| 03/24/1988 | DE3716415A1 Rectifier circuit having a storage inductor which is connected to the load circuit to smooth the pulsating load currents on the output side by means of its load winding |
| 03/22/1988 | US4733213 Layer winding for electrical equipment |
| 03/22/1988 | CA1234413A1 Static converter transformer |
| 03/17/1988 | DE3631438A1 Circuit arrangement to compensate for direct-current magnetomotive forces in transformers |
| 03/16/1988 | EP0259931A1 Inductive device having a core of an amorphous material |
| 03/15/1988 | CA1233968A1 Method of making a void-free non-cellulose electrical winding |
| 03/10/1988 | DE3629310A1 High-current conductor for special transformers |
| 03/09/1988 | EP0258592A1 Potential separation for a choke with an annular core |
| 03/09/1988 | EP0258362A1 High voltage transformer |
| 03/08/1988 | US4730241 Laminated hybrid integrated DC-DC converter |
| 03/08/1988 | US4730178 Bobbins coils with terminal housing |
| 03/02/1988 | EP0257428A1 Electric connector pin for surface-mountable electric bobbins |
| 03/02/1988 | EP0257330A1 Winding device for a transmitter |
| 03/02/1988 | EP0257291A1 Circuit arrangement for the wiring of high power transformers |
| 03/02/1988 | EP0257179A1 Electric noise absorber |
| 03/01/1988 | US4728919 Moisture-tight wound ferrite toroidal core with resin envelope |
| 02/25/1988 | DE3628563A1 Power supply unit having a transformer and a printed circuit board |
| 02/25/1988 | DE3627890A1 Transformer having a magnetic screen, and a method for producing such a screen |
| 02/24/1988 | EP0256583A1 Transformer with a magnetic shield |
| 02/24/1988 | EP0256329A1 Low-voltage winding for air-cooled resin-insulated distribution transformers |
| 02/24/1988 | CN87105430A Power transformer capable of correcting power factor |
| 02/18/1988 | DE3627888A1 Transformer having a magnetic screen |
| 02/18/1988 | DE3627887A1 Transformer with a magnetic screen |
| 02/18/1988 | DE3627180A1 Liquid-cooled transformer |
| 02/16/1988 | US4725806 Contact elements for miniature inductor |
| 02/16/1988 | US4725804 Electrostatic fork shield |
| 02/16/1988 | US4724602 Autotransformer with common winding having oppositely wound sections |
| 02/16/1988 | US4724592 Method of manufacturing a core and winding assembly |
| 02/11/1988 | WO1988001081A1 Transformer life consumption indicator |
| 02/11/1988 | WO1988000849A1 Reclassification of electrical apparatus contaminated with pcb |
| 02/09/1988 | US4724413 Low-noise transformer |
| 02/09/1988 | US4723349 Method of making fixture for the window of a magnetic core |
| 01/27/1988 | EP0254132A1 Apparatus in a ballast or transformer for improving its cooling |
| 01/27/1988 | EP0253978A1 Electric transformer |
| 01/27/1988 | EP0253939A1 Expansible element for an ignition coil |
| 01/26/1988 | US4721935 Bobbins coils with terminal housing |
| 01/26/1988 | US4721900 Self-generated converter filter |
| 01/26/1988 | US4721863 Circuit for providing DC isolation between a pulse generator and a load |
| 01/26/1988 | CA1232041A1 Transformer comprising coaxial coil formers |
| 01/26/1988 | CA1232040A1 Electrical coil assembly and terminal therefor |
| 01/21/1988 | DE3623745A1 Transformer having an air-cooled primary winding which is supplied on the high-voltage side |
| 01/21/1988 | DE3623485A1 Method for producing high-voltage-resistant transformers and inductors |
| 01/21/1988 | DE3623271A1 Laminated iron core for transformers and inductors having two or three wound core limbs |
| 01/20/1988 | EP0253587A2 Current sensing apparatus |
| 01/20/1988 | EP0253494A1 Winding form for high voltage transformer |
| 01/20/1988 | EP0253298A1 High-capacity transformer |
| 01/19/1988 | US4720646 Connection terminal assembly for stator coil |
| 01/14/1988 | WO1988000135A1 Potted electrical/mechanical devices, and dual cure potting method |
| 01/14/1988 | DE3622570A1 Variable-voltage unit for alternating-voltage test installations |
| 01/13/1988 | EP0252396A1 Insulating board between a winding and a core sheet pack and ballast or transformer provided with said insulating board |
| 01/13/1988 | EP0252141A1 Magnetic circuit device provided with a current coil. |
| 01/13/1988 | EP0099408B1 Composite coils for toroidal field coils and method of using same |
| 01/13/1988 | CN87200730U Winding capacity adjusting device of power transformer |
| 01/13/1988 | CN87104005A Passive electric componet |
| 01/12/1988 | US4719433 Attenuation bead for the suppression of interference radiation |
| 01/12/1988 | CA1231399A1 Low core loss rotating flux transformer |
| 01/07/1988 | EP0250842A2 Imaging process for forming ceramic electronic circuits |
| 01/07/1988 | EP0250834A1 Ignition coil, particularly an ignition coil for the ignition devices of internal-combustion engines |
| 01/07/1988 | DE3721427A1 Bauteil zur unterdrueckung von hochfrequenzsignalen Component to suppress high frequency signals |
| 01/05/1988 | US4717901 Electronic component, especially for a chip inductance |
| 01/05/1988 | CA1230983A1 Cooling apparatus for machinery |
| 12/31/1987 | CN87201052U Compound self-coupling transformer |
| 12/30/1987 | WO1987007977A1 Ignition coil for ignition systems of internal combustion engines |
| 12/30/1987 | CN87103745A Ignition coil for ignition systems of internal combustion engines |
| 12/29/1987 | US4716394 Bobbin device |
| 12/26/1987 | CN87201970U Horizontal preamplication transformer for tv sets |
| 12/23/1987 | EP0249827A1 Electric apparatus and method of making the same |
| 12/23/1987 | DE3640992A1 Zuendspule fuer zuendanlagen von brennkraftmaschinen Ignition coil for ignition systems of internal combustion machinery |
| 12/23/1987 | DE3620762A1 Electrical component of chip construction |
| 12/23/1987 | DE3620306A1 Electrical multi-chamber coil former |
| 12/22/1987 | US4714909 Support for transformer windings |
| 12/22/1987 | CA1230652A1 Power transformer for use with very high speed integrated circuits |
| 12/17/1987 | DE3615308A1 Deformation of connecting wires of air-cored coils |
| 12/16/1987 | EP0249277A2 Passive electrical component |
| 12/16/1987 | CN87103257A Transformer core support apparatus |
| 12/15/1987 | US4713723 Isolation transformer |
| 12/15/1987 | US4713642 Face connected instrument transformer |
| 12/10/1987 | DE3618144A1 Arrangement for winding filter coils |
| 12/08/1987 | US4711019 Method of making core laminations, and punch die for carrying out the method |
| 12/05/1987 | CN86207697U Air-cooled dry transformer |
| 12/03/1987 | WO1987007426A1 Preformed multiple turn transformer winding |
| 12/03/1987 | DE3618122A1 Tunable filter coil |
| 12/02/1987 | EP0247544A1 A monitoring device for overhead power transmission system |
| 12/02/1987 | CN87203652U High insulated track trunking transformer |
| 12/02/1987 | CN87103749A 电气变换器 Electrical converter |
| 12/01/1987 | US4709828 Two-part transformer casting having liquid-tight seal |
| 11/25/1987 | EP0246692A2 Surface-mounted electrical power resistor |
| 11/25/1987 | EP0246430A1 Transformer core support |
| 11/24/1987 | US4709205 Inductive sensor for current measurement |
| 11/24/1987 | CA1229667A1 Insulation of metallic surfaces in power transformers |
| 11/24/1987 | CA1229666A1 Electrical coil assembly |
| 11/19/1987 | WO1987007074A1 Transformer structure |
| 11/19/1987 | WO1987007073A1 Ignition coil for ignition apparatus of internal combustion engines |
| 11/19/1987 | EP0245598A1 Fluid-cooled transformer having a gas cushion compensating for volume variations due to temperature changes |
| 11/17/1987 | CA1229390A1 Transformer and process for its fabrication |
| 11/17/1987 | CA1229381A1 Self-controlled variable inductance with gaps |