| Patents for H01F 27 - Details of transformers or inductances, in general (43,362) |
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| 01/22/1992 | EP0466738A1 Device for a.c. cut-in limitation. |
| 01/22/1992 | EP0466707A1 Welding apparatus and transformer therefor |
| 01/22/1992 | CN2094105U High-tension transformer of mosquito and fly killer |
| 01/22/1992 | CN2094103U Head construction of no-excitation tapping switch |
| 01/22/1992 | CN2094102U Inner and outer insulating layer frames of current transformer |
| 01/21/1992 | US5082535 Apparatus for the extraction of oil or polychlorinated biphenyl from electrical parts through the use of solvents and for distillation of the solvents |
| 01/21/1992 | US5082012 Simplified apparatus for decontaminating electrical apparatus contaminated with PCBs |
| 01/16/1992 | DE4021860A1 Reduction of transformer noise - is obtained by second winding with compensating current generation |
| 01/16/1992 | DE4021832A1 Compensating current converter in magnetic bridge circuit - has compensating coil that receives output of magnetic field sensor |
| 01/15/1992 | EP0466642A1 Shielding for an electric device |
| 01/15/1992 | EP0466556A1 Process for making an integrated LC component |
| 01/15/1992 | EP0465803A2 Current transformer mounting mechanism for circuit breaker |
| 01/15/1992 | EP0465700A1 Single winding inductor |
| 01/15/1992 | CN2093433U Water-cooling device |
| 01/14/1992 | CA1294328C Method and apparatus for minimizing the magnetizing current passing through a transformer |
| 01/09/1992 | DE4120097A1 HF coil assembly with thin walled core - having recess to prevent fracture by force applied by burr formed on cover during mfr. |
| 01/09/1992 | DE4020305A1 Coil for surface mounting - has former that responds to heating to adjust shape and vary inductance |
| 01/08/1992 | EP0464924A1 High voltage transformer, particularly for an X-ray apparatus |
| 01/08/1992 | EP0464569A1 Symmetric transformer for transmission equipment |
| 01/08/1992 | CN2092806U 电压互感器 Voltage transformer |
| 01/08/1992 | CN2092805U Iron core transformer with e model lamination |
| 01/07/1992 | US5079462 Brushless electrical power generator with reduced harmonics |
| 01/01/1992 | CN2092138U 象限变压器 Quadrant transformer |
| 01/01/1992 | CN2092136U Mutual inductor packed in non-saturated polyester glass fibre plastics |
| 01/01/1992 | CN2092102U Device for preventing fraudulent use of high-voltage electricity |
| 01/01/1992 | CN1015286B Anti-thunderstruck device for distribution transformer |
| 12/27/1991 | EP0462529A1 Method and device for cleaning of contaminated substances and appliances |
| 12/25/1991 | CN2091488U Printed circuit type transformer |
| 12/25/1991 | CN2091487U Labyrinth type hygrometric unit |
| 12/25/1991 | CA2038148A1 Search coil assembly with laminate frame members and method for making same |
| 12/24/1991 | US5075663 Noise-shielded transformer |
| 12/24/1991 | US5075150 Pack of laminations with projections and depressions in torsionally flexible contact |
| 12/24/1991 | CA1293539C Magnetic device for high-voltage pulse generating apparatuses |
| 12/18/1991 | EP0462005A1 Coil, coil element, coil block, and heat generating motor, hot air blower and submersible water heater assembled therefrom |
| 12/18/1991 | EP0461829A1 Method of making a transformer core |
| 12/18/1991 | EP0461712A1 Transformer having an air gap and an insulation foil packet |
| 12/18/1991 | EP0461664A1 Electromagnetic induction device |
| 12/18/1991 | EP0252141B1 Magnetic circuit device provided with a current coil |
| 12/18/1991 | CN2091054U Induction ballast |
| 12/17/1991 | US5073766 Transformer core and method for stacking the core |
| 12/17/1991 | US5073765 Retaining band for a transformer core |
| 12/17/1991 | US5072508 Method of making an inductive-resistive circuit element |
| 12/15/1991 | CA2044514A1 Coil, coil element, coil block, and heat generating motor assembled therefrom |
| 12/12/1991 | WO1991019305A1 A method and a shield for shielding a current transformer as well as a current transformer including such a shield |
| 12/12/1991 | WO1991019304A1 Transformer |
| 12/12/1991 | DE4117878A1 Miniature planar magnetic element e.g. induction coil or transformer - is formed by layers of insulating and magnetic material on either side of coil |
| 12/11/1991 | EP0461000A1 Antenna tuner unit for tactical HF apparatus |
| 12/11/1991 | EP0460760A1 Sintered transformer core of MnZn-ferrite and a transformer comprising such a core |
| 12/11/1991 | EP0460506A2 Electric coil device for use as a transformer or the like |
| 12/11/1991 | EP0460218A1 Construction of armature of electromagnetic brake |
| 12/11/1991 | CN2090570U Oblique laminated variable autotransformer |
| 12/10/1991 | US5072158 Silent lamp igniter |
| 12/10/1991 | US5072146 Magnetic bearings coil heat removal |
| 12/10/1991 | US5071509 Forming electroconductive film, etching, then forming dielectric film, etching; miniaturization |
| 12/04/1991 | EP0459570A1 Inductance or transformer, particularly for switching mode current supply device |
| 12/04/1991 | EP0459326A1 Liquid cooled choke coil |
| 12/04/1991 | CN2090102U Core construction of water-cooled apparatus |
| 12/04/1991 | CN2090064U Self contained measuring device for power transformer |
| 12/03/1991 | US5069731 Low-frequency transformer |
| 12/03/1991 | CA1292766C Monitoring device for overhead power transmission system |
| 11/27/1991 | EP0458482A2 Horizontal sweep circuit for a cathode ray tube device |
| 11/27/1991 | EP0457933A1 Coil bobbin |
| 11/26/1991 | US5067917 Component mounting frame |
| 11/26/1991 | US5067434 Electrostatic paint spray gun |
| 11/21/1991 | DE4015564A1 Transformer with connections protected from external damage - has meander-shaped connection between terminal pin and internal winding |
| 11/19/1991 | WO1991018404A1 Magnetic cores utilizing metallic glass ribbons and mica paper interlaminar insulation |
| 11/19/1991 | US5066937 Search coil assembly with laminate frame members and method for making same |
| 11/14/1991 | WO1991017555A1 Matching transformer for high and medium frequency induction heating |
| 11/13/1991 | EP0456583A1 Homopolar transformer for differential switches or circuit breakers, and mounting method |
| 11/12/1991 | US5065186 Magnetic emissions reduction apparatus and method |
| 11/06/1991 | EP0455538A1 Wall lead-through for an electrical cable |
| 11/06/1991 | EP0454805A1 Controlled drying-impregnation-polymerization processes |
| 11/05/1991 | US5062197 Dual-permeability core structure for use in high-frequency magnetic components |
| 11/04/1991 | CA2039036A1 Magnetic emissions reduction apparatus and method |
| 10/30/1991 | EP0453637A1 Current transformer |
| 10/30/1991 | CN2087811U Miniature core-type or shell-type transformer iron core sheet-inserting machine |
| 10/29/1991 | US5061910 Balun transformers |
| 10/27/1991 | CA2041022A1 Wall bushing for an electric cable |
| 10/24/1991 | DE4114576A1 Automatically cooling transformers, battery chargers etc. - fitted in airtight and/or spray watertight unit serving as heat converter with pipe leading to heat sink |
| 10/23/1991 | EP0452992A2 Electric noise absorber |
| 10/23/1991 | CN2087418U Thin piece type radiator |
| 10/22/1991 | US5058821 Coil bobbin |
| 10/22/1991 | CA1291264C Multi-phase electronic temperature controller |
| 10/22/1991 | CA1291262C Transformer life consumption indicator |
| 10/17/1991 | WO1991015862A1 Soft magnetic core in a closed electromagnetic circuit |
| 10/15/1991 | US5057808 Transformer with voltage balancing tertiary winding |
| 10/08/1991 | US5055815 Stationary induction electric apparatus |
| 10/08/1991 | US5055794 Static induction electric apparatus |
| 10/03/1991 | WO1991015022A1 Cable coupling transformer |
| 10/03/1991 | WO1991015021A1 Inductive circuit element for assembly of printed circuit broads |
| 10/03/1991 | WO1991015020A1 Magnetic core |
| 10/02/1991 | CN2085996U Dry transformer with sectional clad casing |
| 10/01/1991 | US5053476 Epoxy resin composition based on bisphenol epoxy, polyetherpolyol, anhydride and imidazole |
| 09/26/1991 | DE4037080A1 Encapsulated transformer with terminals tightly fitting slits - has U=shaped edge terminal blocks held in recesses |
| 09/25/1991 | CN2085554U Energy-saving drying type transformer and reactance |
| 09/25/1991 | CN2085553U Ac-dc double purpose transformer for line-frequency resonance test |
| 09/24/1991 | US5051867 Transformer assembly with exposed laminations and hollow housings |
| 09/24/1991 | US5051712 LC filter |
| 09/19/1991 | WO1991014274A1 High efficiency encapsulated power transformer |
| 09/19/1991 | DE4008077A1 Encapsulated electrical transformer module - has ring core and windows in box shaped housing |