| Patents for H01F 30 - Fixed transformers not covered by group (4,595) |
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| 07/09/1997 | EP0782755A1 Power supply conductor from the conductive foil of the foil winding of a power transformer |
| 07/02/1997 | EP0782154A1 Flat transformer |
| 07/02/1997 | CN2257397Y Three-purpose earthing transformer |
| 06/25/1997 | CN2257073Y Current-limiting reactor for non-axial electrodynamic force power capacitor |
| 06/25/1997 | CN1152970A Power supply conductor from the conductive foil of the foil winding of a power transformer |
| 06/24/1997 | US5642269 Power supply apparatus having separate plural outputs |
| 06/18/1997 | CN2256582Y Multiple magnetic circuit transformer |
| 06/18/1997 | CN2256581Y Reactor for series speed change drive |
| 06/12/1997 | WO1997021233A1 High isolation power transformer |
| 06/12/1997 | DE19542529C1 Fixed choke arrangement for testing HV systems e.g. gas-insulated switchgear or cables |
| 06/05/1997 | WO1997020330A1 Flexible coil winding structure of flyback transformer and manufacturing process thereof |
| 06/05/1997 | WO1997020329A1 Flexible coil winding structure of flyback transformer and manufacturing process thereof |
| 06/04/1997 | EP0522014B1 Cable coupling transformer |
| 05/21/1997 | CN2254588Y Ring-shaped iron core power transformer |
| 05/20/1997 | US5631822 Integrated planar magnetics and connector |
| 05/14/1997 | CN2254231Y Three-phase three-pillar lap joint type transformer |
| 05/14/1997 | CN1149748A Three balance three sectiont ransformer |
| 05/13/1997 | US5629842 Two-stage, high voltage inductor |
| 05/07/1997 | DE19540525A1 Transformer for SMPS for generating safety electric LV, esp. for operating one or more halogen lamps |
| 05/07/1997 | CN2253865Y Small transformer capable of bearing over 6KV surge voltage |
| 05/07/1997 | CN2253864Y Multi-layer open type hollow inductance coil |
| 04/16/1997 | CN2252394Y Second landing star-multitriangle wiring balance tractive transformer |
| 04/16/1997 | CN1147681A Multi-layer opened hollow inductor coil |
| 04/09/1997 | CN2251784Y Three-phase ac electric welder |
| 04/08/1997 | US5619407 For converting three-phase ac power to nine-phase ac power |
| 04/08/1997 | US5619174 Iron, boron, metal alloy; switching power sources, converters |
| 04/08/1997 | US5618455 Electric welding machine |
| 04/02/1997 | EP0766274A2 Transformer structure |
| 04/02/1997 | EP0766273A2 Transformer structure |
| 03/26/1997 | CN1146255A Improvements relating to transformers/inductors |
| 03/20/1997 | DE19534560A1 Toroidal core current transformer esp. for three=phase current transformer design |
| 03/13/1997 | WO1997009728A1 Encased magnetic core |
| 03/13/1997 | CA2230276A1 Casing enclosed type magnetic core |
| 02/26/1997 | CN2248379Y Star-multitriangle wiring balance transformer |
| 02/12/1997 | CN2247365Y Outdoor dry hollow parallel electric reactance with along surface creepage protective function |
| 02/05/1997 | EP0757365A2 Integrated transformer having functions of receiving and transforming equipment |
| 02/05/1997 | CN1142116A Functional transformer for combined current-collecting-transforming equipment |
| 01/30/1997 | WO1997003451A1 Power saving apparatus using mutual inductive reactor |
| 01/29/1997 | CN2246326Y High energy saving, low magnetism leakage winding magnetic core transformer |
| 01/22/1997 | CN2245798Y Trigone post type iron core transformer |
| 01/22/1997 | CN1140889A Inductive transformer and its producing method |
| 01/15/1997 | CN2245261Y Ring transformer for special coil |
| 01/14/1997 | US5594402 High voltage isolating transformer module |
| 01/09/1997 | WO1997001177A1 Selv-generating transformer for supply switches |
| 01/07/1997 | US5592150 Air coil and method of making the same |
| 12/27/1996 | WO1996042095A1 Flat transformer |
| 12/25/1996 | CN2243710Y Adjustable three phase self-coupling voltage transformer |
| 12/18/1996 | CN1138205A Transformer coil and its manufacturing method |
| 12/05/1996 | WO1996038849A1 High voltage isolating transformer module |
| 12/04/1996 | CN2241915Y Star-opening-closing delta wiring pulling transformer |
| 12/03/1996 | US5581224 Choke coil for eliminating common mode noise and differential mode noise |
| 11/26/1996 | US5579202 Transformer device |
| 11/26/1996 | US5577316 Method for producing a mini-transformer with molded cover and retention structure |
| 11/20/1996 | CN2240773Y Loaded intelligent voltage-regulating insulation transformer |
| 11/13/1996 | CN2240192Y Composite characteristic three-phase power transformer |
| 11/12/1996 | US5574418 Three-phase autotransformer with a balancing function |
| 11/05/1996 | US5572179 Thin film transformer |
| 10/31/1996 | DE19612319A1 Transformer, in particular, for a welding unit |
| 10/30/1996 | CN2239068Y Power switch transformer for broadcast sending machine |
| 10/24/1996 | DE19615352A1 Three=phase toroidal core for transformers or chokes |
| 10/23/1996 | CN1134029A 高压变压器 High-voltage transformers |
| 10/22/1996 | US5566443 Methods of making power distribution transformers |
| 10/10/1996 | WO1996031889A1 Two-stage, high voltage inductor |
| 10/10/1996 | CA2215136A1 Two-stage, high voltage inductor |
| 10/08/1996 | US5563778 Uninterruptible power supply system |
| 10/02/1996 | CN2236681Y Electric power transformer for single or three phase supply |
| 09/24/1996 | US5559682 Multi-output DC-DC convertor |
| 09/24/1996 | US5559487 Winding construction for use in planar magnetic devices |
| 09/18/1996 | CN2235651Y Capacity improved type three-phase transformer |
| 09/18/1996 | CN2235650Y Transformer for power supply of single-phase and three-phase |
| 09/18/1996 | CN2235649Y Transformer for power supply of single-phase and three-phase |
| 09/17/1996 | US5557249 Load balancing transformer |
| 09/05/1996 | DE19604192A1 Three=phase transformer arrangement |
| 09/05/1996 | DE19508695A1 Transformer terminal design with insulating housing |
| 09/04/1996 | CA2169590A1 Phase shifting transformer or autotransformer |
| 08/21/1996 | EP0727792A1 High voltage transformer |
| 08/13/1996 | US5546065 High frequency circuit having a transformer with controlled interwinding coupling and controlled leakage inductances |
| 08/08/1996 | WO1996024146A1 Device for voltage control |
| 08/08/1996 | DE19543249A1 Tap-changing voltage regulator esp. for discharge-lamp street lighting |
| 08/08/1996 | DE19541341A1 Tap-changing voltage regulator esp. for discharge-lamp street lighting |
| 08/07/1996 | CN2232618Y Transformer using magnetic material protection box as low-voltage winding |
| 08/07/1996 | CN1128395A Transformer structure and substation apparatus |
| 08/06/1996 | US5543773 Transformers and coupled inductors with optimum interleaving of windings |
| 08/06/1996 | US5543771 Phase shifting transformer or autotransformer |
| 07/31/1996 | EP0724275A1 High-voltage transformer equipment |
| 07/30/1996 | CA2092873C Fault current detection and indicating device for arresters or isolators |
| 07/25/1996 | WO1996022607A1 Multi-phase transformer |
| 07/24/1996 | CN2231835Y Power phase-change transformer |
| 07/23/1996 | US5539369 Multiple-toroid induction device |
| 07/16/1996 | US5537089 Three phase transformer with reduced harmonic currents |
| 07/10/1996 | CN2230971Y Transformer for rectification |
| 07/03/1996 | EP0719199A1 Tool head with external current supply |
| 06/27/1996 | WO1996019394A1 Packaging for patches |
| 06/27/1996 | CA2208306A1 Packaging for patches |
| 06/05/1996 | EP0547120B1 Power transformers and coupled inductors with optimum interleaving of windings |
| 06/04/1996 | US5522946 Amorphous magnetic thin film and plane magnetic element using same |
| 05/28/1996 | CA2075572C High energy dissipation harmonic filter reactor |
| 05/22/1996 | CN1122877A Ignition device for an internal combustion engine |
| 05/15/1996 | CN2227375Y Voltage-limiting output transformer for road traffic signal lamp |
| 05/08/1996 | EP0710965A2 Transformer structure and equipment therefor |