| Patents for H01F 30 - Fixed transformers not covered by group (4,595) |
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| 03/24/2005 | WO2005027155A1 A method of making a three-phase transformer with triangular core structure and a three-phase transformer with triangular core structure thereof |
| 03/24/2005 | WO2004072994A3 Polymer sheet core and coil insulation for transformer |
| 03/24/2005 | US20050061294 Direct fuel-injected internal combustion engine having improved spark ignition system |
| 03/23/2005 | CN2687807Y High voltage trans former for current converter |
| 03/23/2005 | CN2687806Y Transformer module structure |
| 03/16/2005 | CN2686060Y Transformer and lamp tube drive system |
| 03/16/2005 | CN2686057Y Transformer with radiating device |
| 03/16/2005 | CN1193489C Supply unit, electronic ballast using the supply and self-ballasting fluorescent lamp |
| 03/09/2005 | CN2684346Y Transformer for power supplier |
| 03/09/2005 | CN2684345Y A step up transformer for arc generating of argon welder |
| 03/09/2005 | CN2684342Y Insulated packaging coil assembly |
| 03/09/2005 | CN1591712A Low transformer mfg method and low transformer |
| 03/03/2005 | DE10036062B4 Verfahren zum Einbetten einer Spule eines Transformators in Harz A method of embedding a coil of a transformer in resin |
| 03/01/2005 | US6861938 High-frequency power inductance element |
| 03/01/2005 | US6861936 Autotransformer-based system and method of current harmonics reduction in a circuit |
| 03/01/2005 | US6860762 Electrical cable and connector assembly with voltage step down system |
| 02/24/2005 | DE102004030598A1 Electrical transformer for switched main supplies is produced with a core of compacted magnetic powder |
| 02/23/2005 | CN2681303Y Single phase AC step transformer |
| 02/22/2005 | US6859127 Device for combining annular transformers with a machine housing |
| 02/17/2005 | US20050036638 Transmission coil system and remote control for a hearing aid |
| 02/17/2005 | US20050035838 Auto-transformer for use with multiple pulse rectifiers |
| 02/16/2005 | CN2679813Y Energy saving transformer of ore heating furnace |
| 02/16/2005 | CN2679812Y Six-splitting drying phase-shiftnig rectiformer |
| 02/16/2005 | CN1189898C Coil element and making method thereof |
| 02/10/2005 | US20050030140 Multiphase induction device |
| 02/10/2005 | DE10331316A1 Ferritsystem Ferrite |
| 02/09/2005 | CN2678084Y C-grade non-seal coil air-immersed transformer |
| 02/09/2005 | CN1577653A 开关变压器 Switching Transformer |
| 02/08/2005 | US6853284 High-voltage transformer |
| 02/03/2005 | US20050024179 Extended E matrix integrated magnetics (MIM) core |
| 02/02/2005 | EP1502268A2 Construction of medium voltage power line data couplers |
| 02/02/2005 | EP1502267A1 Transformer |
| 02/02/2005 | CN1187766C Transformer |
| 02/02/2005 | CN1187765C Earth cooled distribution transformer system |
| 01/27/2005 | US20050017054 Flyback transformer wire attach method to printed circuit board |
| 01/26/2005 | CN2674613Y Swing type moving vehicle set transformer |
| 01/26/2005 | CN1186788C 高电压变压器 High voltage transformer |
| 01/19/2005 | CN2672822Y Three phase three winding resin casted dry transformer |
| 01/19/2005 | CN1567487A Three-phase stereo spiral iron core transformer |
| 01/18/2005 | US6844802 Parallel core electromagnetic device |
| 01/13/2005 | WO2005004180A1 Transformer apparatus, method for manufacturing the same, and high-frequency heating device having the same |
| 01/13/2005 | WO2005004176A1 High-frequency heating device |
| 01/13/2005 | US20050007029 Inverter transformer and inverter circuit |
| 01/13/2005 | US20050006367 Power source for high current welding |
| 01/13/2005 | US20050006366 Transformer module for a welder |
| 01/13/2005 | US20050005673 Ferrite system |
| 01/12/2005 | EP1496527A1 Transformer module for a welder |
| 01/12/2005 | CN2671096Y Transformer for liquid-crystal displaying device background light |
| 01/12/2005 | CN2671095Y H-stage drying electrical transformer structure |
| 01/12/2005 | CN1564277A High efficiency low leakage intermediate-frequency power transformer and its mfg. method |
| 01/11/2005 | US6842100 High voltage transformer for microwave oven and method of manufacturing therefor |
| 01/11/2005 | US6841975 Voltage regulator having insert slots |
| 01/11/2005 | CA2462464A1 Transformer module for a welder |
| 01/06/2005 | WO2005001857A1 Transformer with protection against direct current magnetization caused by zero sequence current |
| 01/05/2005 | CN2669334Y Self-coupling-compensating and harmonic-wave shielded rectiformer |
| 12/29/2004 | WO2004114507A2 Three-phase transformer |
| 12/29/2004 | WO2004114499A2 Parallel core electromagnetic device |
| 12/29/2004 | WO2004114335A1 Three-phase transformer |
| 12/29/2004 | CN2667628Y Improved structure of high voltage transformer |
| 12/29/2004 | CN1558428A Voltage transformer arrangement |
| 12/23/2004 | WO2004112274A1 Signal filling/extraction device |
| 12/23/2004 | WO2004112193A2 Electrical cable and connector assembly with voltage step down system |
| 12/23/2004 | US20040257188 Three-phase transformer |
| 12/23/2004 | US20040257187 Parallel core electromagnetic device |
| 12/22/2004 | CN1181509C Electromagnetic device and high-voltage generating device and method of producing electromagnetic device |
| 12/22/2004 | CN1181508C Capacitive transformer preventing thunderstruck and interference |
| 12/16/2004 | US20040253873 Electrical cable and connector assembly with voltage step down system |
| 12/15/2004 | CN2664134Y A semi-buried amorphous alloy combined transformer structure |
| 12/15/2004 | CN2664133Y Transformer modularized composite structure |
| 12/15/2004 | CN2664131Y A single machine 18-phase rectifier transformer |
| 12/15/2004 | CN1180444C Battery for hand held device electricity recharge |
| 12/09/2004 | US20040246749 Method and apparatus for substantially reducing electrical earth displacement current flow generated by wound components |
| 12/09/2004 | US20040246087 Electric component and method of producing the same |
| 12/09/2004 | US20040245969 Power converters |
| 12/09/2004 | DE10323219B3 Sendespulensystem und Fernbedienung für ein Hörhilfsgerät Transmitting coil system and remote control for a hearing aid |
| 12/08/2004 | CN1179376C High-voltage transformer |
| 12/07/2004 | US6828894 Isolation transformer arrangement |
| 12/07/2004 | CA2304882C Power distribution network incorporating a voltage support transformer and process of use |
| 12/01/2004 | CN2660662Y Anti-radiation type 3-phase high voltage rectifying transformer |
| 12/01/2004 | CN1551257A Electric component and method of producing the same |
| 12/01/2004 | CN1551256A Transformer assembly, and power conversion apparatus and solar power generation apparatus using the same |
| 12/01/2004 | CN1551255A High voltage transformer and microwave oven provided with the same |
| 12/01/2004 | CN1551253A Electric component and method of producing the same |
| 11/25/2004 | US20040233683 Method and apparatus for substantially reducing electrical earth displacement current flow generated by wound components without requiring additional windings |
| 11/25/2004 | US20040233028 Method and apparatus for substantially reducing electrical earth displacement current flow generated by wound components without requiring additional windings |
| 11/25/2004 | US20040232971 Electrically insulated switching element drive circuit |
| 11/24/2004 | EP1480492A2 Transmission coil system and remote control for a hearing aid |
| 11/24/2004 | EP1325545A4 Electronic transformer/inductor devices and methods for making same |
| 11/24/2004 | CN2659083Y Transformer and transformer unit with the transformer |
| 11/24/2004 | CN2658920Y Multi-winding high voltage frequency change power source transformer |
| 11/24/2004 | CN1549282A Transformer structure |
| 11/23/2004 | US6822549 Method for increased coupling coefficient in a pulse type transformer through coil configuration and varied core area |
| 11/23/2004 | US6820321 Holes are formed through a ferromagnetic substrate and plated with conductive material; substrate is used for a magnetic core; rings are etched on a substrate; minimal eddy current effects |
| 11/17/2004 | EP1477996A1 Three phase choke coil with reduced emission of electromagnetic energy in the environment |
| 11/17/2004 | CN2657177Y High frequency transformer |
| 11/11/2004 | US20040222874 Electric component and method of producing the same |
| 11/11/2004 | US20040222873 Transformer assembly, and power conversion apparatus and solar power generation apparatus using the same |
| 11/11/2004 | US20040222872 High voltage transformer and microwave oven provided with the same |
| 11/11/2004 | US20040222777 Voltage regulator having insert slots |
| 11/11/2004 | US20040222708 Electric oscillatory machine |