| Patents for H01F 30 - Fixed transformers not covered by group (4,595) |
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| 06/20/2001 | CN1300087A Stepdown piezoelectric ceramic autotransformer and its making process |
| 06/19/2001 | US6249443 Nine-phase transformer |
| 06/14/2001 | WO2001043267A1 Power supply with flux-controlled transformer |
| 06/13/2001 | EP1105891A1 Planar transformer |
| 06/13/2001 | DE19959732A1 Inductive device has conductors stacked in helical strip essentially perpendicular to cylindrical surface axis, wound around core to form annular or tubular winding body |
| 06/06/2001 | CN1298190A Contravariant transformer and discharge lamp firing circuit using the same contravariant transformer |
| 06/06/2001 | CN1298189A Electromagnetic interference shielding for small magnetic apparatus |
| 06/06/2001 | CA2326798A1 Current transformer and method for correcting asymmetries therein |
| 05/31/2001 | DE10036062A1 Coil resin molding method for microwave oven transformer, involves injecting resin into metallic mold after inserting assistant tool along with coil into cavity so as to form resin coating on coil |
| 05/30/2001 | EP1103994A1 Electromagnetic interference shielding for small magnetic devices |
| 05/30/2001 | CN2432668Y Triangle iron-core electric transformer |
| 05/30/2001 | CN1297234A Transformer with high coupling efficiency |
| 05/23/2001 | EP1101258A1 High pulse rate pulse power system |
| 05/23/2001 | CN2431631Y Special shape structure for three-phase transformer |
| 05/23/2001 | CN1296273A 变压器 Transformer |
| 05/23/2001 | CN1066294C Sub-resonant series resonant converter having improved form factor and reduced EMI |
| 05/17/2001 | DE19943576C1 Transformator Transformer |
| 05/10/2001 | WO2001033584A1 Earth cooled distribution transformer system and method |
| 05/09/2001 | EP1097506A1 Switching power supply circuit |
| 05/03/2001 | WO2001031781A1 High frequency, large bandwidth balun and method of manufacturing |
| 05/02/2001 | CN2428848Y Three-phase to four-phase electric transformer |
| 05/02/2001 | CN2428847Y Transformer with voltage switch |
| 05/01/2001 | US6225874 Coupling structure as a signal switch |
| 04/25/2001 | CN2427580Y Theft-proof electromagnetic lock for powder supply transformer |
| 04/25/2001 | CN1292926A High pulse rate ignition source |
| 04/18/2001 | CN1064745C 点火线圈装置 Ignition coil device |
| 04/12/2001 | DE19947917A1 Transformer has high voltage side enclosed at least in partly by low voltage side with coaxial inner conductor, tube forming housing with bridging cap connected to conductor |
| 04/11/2001 | EP1091369A2 Low profile transformer and method for making a low profile transformer |
| 04/11/2001 | CN2426637Y Non-only impedance matching value balancing transformer |
| 04/11/2001 | CN2426636Y Open ventilating dry type power transformer |
| 04/10/2001 | US6215386 Coil device |
| 04/05/2001 | WO2001024204A1 Transformer |
| 04/04/2001 | EP1089303A1 Isolation transformers |
| 04/04/2001 | CN1290018A Interfere wave shielding converter |
| 04/03/2001 | US6211766 High voltage transformer |
| 04/03/2001 | US6210598 Mn-Zn ferrite |
| 03/29/2001 | WO2001022445A1 Isolation transformer arrangement |
| 03/27/2001 | US6208230 Transformer for cycloconverter |
| 03/21/2001 | EP1085537A2 Planar transformer, manufacturing process of its winding and compact electrical device comprising such a planar transformer |
| 03/21/2001 | EP1085536A1 Transformer |
| 03/13/2001 | US6201463 Inverter transformer |
| 03/07/2001 | CN1286481A Inductance device |
| 03/06/2001 | US6198761 Coaxial laser pulser with solid dielectrics |
| 03/06/2001 | US6198647 Twelve-phase transformer configuration |
| 03/06/2001 | US6198644 Rectifying/smoothing circuit and double-ended converter |
| 02/28/2001 | EP1079673A2 Surface mount circuit assembly |
| 02/20/2001 | US6191968 Wye connected 3-phase to 9-phase auto-transformer with reduced winding currents |
| 02/15/2001 | DE10034229A1 Microwave oven transformer has first core with coil insert section with open side, mutually insulated coils inserted in defined sequence, second core coupled to first core, molded cover |
| 02/14/2001 | EP1076344A1 Inductance device |
| 02/14/2001 | CN1283860A Three-phase transformer with ideal oblique joining and its usage |
| 02/07/2001 | CN2418569Y 三相变压器 Three-phase transformer |
| 02/07/2001 | CN2418568Y Wound iron-core three-phase distribution transformer |
| 02/07/2001 | CN1282970A High voltage transformer used for microwave oven and its manufacturing method |
| 02/06/2001 | US6185113 Transformer and switching regulator that prevents winding's caused by magnetic field leakage |
| 01/31/2001 | CN1282097A Method for forming resin moulded parts of transformer coil |
| 01/31/2001 | CN1282083A Transformer for microwave oven |
| 01/31/2001 | CN1282081A Step-up transformer for high freguency heater |
| 01/30/2001 | US6181125 Combination apparatus of a distribution transformer and switches |
| 01/30/2001 | US6180022 Mn-Zn ferrite |
| 01/25/2001 | DE19934767A1 Magnetisches Bauelement Magnetic component |
| 01/24/2001 | EP1071101A1 Magnetic component |
| 01/24/2001 | CN2416585Y Outdoor dry transformer on column |
| 01/24/2001 | CN2416579Y Lmproved structure of small size transformer |
| 01/16/2001 | US6175295 Inductance device |
| 01/10/2001 | CN1279377A Microwave oven |
| 01/10/2001 | CN1060580C Dry transformer of fire-proof epoxy resin |
| 01/03/2001 | CN2413351Y Short-circuit current-limiting three-phase transformer |
| 01/03/2001 | CN1278648A Material saving transformer |
| 12/28/2000 | DE19927299A1 Transformer for a switching network part has an outer-lying coil formed by a trough-like housing following in the peripheral direction of the magnetic core |
| 12/27/2000 | CN2412282Y Single phase transformer on pole |
| 12/26/2000 | US6166531 Three phase to single phase power protection system with multiple primaries and UPS capability |
| 12/19/2000 | US6163242 Rotationally symmetrical high-voltage pulse transformer with tesla resonance and energy recovery |
| 12/19/2000 | US6162067 Coil-bobbin for AC adapter |
| 12/13/2000 | CN1276610A Transformer for generating high voltage |
| 12/12/2000 | US6160328 Electric motor |
| 12/07/2000 | DE19925393A1 Summing current transformer for fault current protection device |
| 12/06/2000 | EP1058279A1 Boosting transformer for high-frequency heating device |
| 11/29/2000 | CN2408558Y Lighting protection isolated transformer |
| 11/28/2000 | US6154113 Transformer and method of assembling same |
| 11/22/2000 | CN1274164A Line interface transformer |
| 11/16/2000 | WO2000069231A1 High-voltage transformer and electrodynamic particle accelerator |
| 11/16/2000 | WO2000069059A1 Switching power supply circuit |
| 11/16/2000 | WO2000069035A1 Coaxial laser pulser with solid dielectrics |
| 11/14/2000 | US6145774 Method and apparatus for manufacturing toroidal cores |
| 11/09/2000 | DE10004814A1 Power supply transformer for telephones, has bobbin which is divided into winding frames by flange such that sufficient distance and insulation is provided between input and output windings |
| 11/08/2000 | EP1050952A1 Rectifying/smoothing circuit and double-ended converter |
| 11/08/2000 | CN2405301Y Energy-saving, environmental protection and light wt. electric power transformer |
| 10/31/2000 | US6138344 Methods of manufacturing a magnetic device and tool for manufacturing the same |
| 10/26/2000 | DE19917599A1 Power inverter with filter for driving motor |
| 10/25/2000 | CN1271458A Power distribution network incorporating a voltage support transformer and process of use |
| 10/24/2000 | US6137393 Power cord provided with a power cord transformer |
| 10/19/2000 | DE19844641C1 Sum current transducer soft magnetic core manufacturing method uses plastic deformation of annular core to provide elliptical core cross-section |
| 10/18/2000 | CN1270397A High voltage transformer |
| 10/11/2000 | EP1043738A1 High-voltage transformer |
| 10/04/2000 | CN2399816Y High frequency large current transformer |
| 10/03/2000 | US6127911 Transformer |
| 09/27/2000 | CN2398716Y High-voltage rectifier for tar dust removing equipment |
| 09/27/2000 | CN2398715Y Fire-resistance paper foil wrapped type three-phase air-immersed transformer |
| 09/26/2000 | US6124778 Magnetic component assembly |
| 09/26/2000 | CA2222809C High voltage isolating transformer module |