| Patents for H01F 21 - Variable inductances or transformers of the signal type (1,432) |
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| 03/26/2009 | WO2008087207A3 Anisotropic magnetic elements for spintronic devices |
| 03/26/2009 | US20090079269 Power transmission control device, power transmitting device, power receiving device, non-contact power transmission system, electronic instrument, secondary coil position detection method, and primary coil positioning method |
| 03/25/2009 | EP2038902A1 Programmable inductor |
| 03/18/2009 | CN101388551A Electricity quality intelligent monitoring and resonating device |
| 03/05/2009 | WO2009029484A1 Mass magnifier using magnetic fields and mu-metal to provide an energy storage flywheel for use in conventional, microtechnology, and nanotechnology engines |
| 03/05/2009 | WO2009028269A1 Element assembly, and its manufacturing method |
| 03/04/2009 | CN101377970A Interactive screw type inductive element |
| 03/03/2009 | US7498922 Self-damped inductor |
| 02/25/2009 | CN100464420C Variable inductor for integrated circuit and printed circuit board |
| 02/12/2009 | US20090040683 Electrical devices having adjustable capacitance |
| 02/11/2009 | EP1327252A4 Linear inductive fluid level sensor |
| 01/28/2009 | CN101354951A Magnetic path parallel connection leakage self-shielding type controllable inductor |
| 01/22/2009 | WO2008145478A3 Tunable inductive component and use of the component |
| 01/21/2009 | EP2016598A2 Electricity generating apparatus utilizing a single magnetic flux path |
| 01/14/2009 | EP1554590B1 Device for a coil assembly as magnetic field sensor for position determination |
| 01/14/2009 | CN201181625Y Iron core reactor with adjustable reactance rate |
| 01/14/2009 | CN101345123A Inductor-adjustable apparatus |
| 01/14/2009 | CN101345122A Direct current flux control type adjustable reactor |
| 01/08/2009 | US20090009274 Short-circuit indicator for electrical lines for power distribution |
| 01/06/2009 | US7474188 40° phase-shifting autotransformer |
| 12/31/2008 | CN100447915C Micro-electromechanical inductive switch |
| 12/25/2008 | US20080315982 Coupled-inductor core for unbalanced phase currents |
| 12/17/2008 | CN101325115A Inductive element |
| 12/11/2008 | US20080303505 Self Tuning High Voltage Power Supply |
| 12/04/2008 | DE102007024908A1 Abstimmbares induktives Bauelement und Verwendung des Bauelements A tunable inductor and use of the device |
| 12/02/2008 | US7460001 Variable inductor for integrated circuit and printed circuit board |
| 12/02/2008 | US7459904 Precision position sensor using a nonmagnetic coil form |
| 11/25/2008 | US7456716 Electrical devices having adjustable electrical characteristics |
| 11/20/2008 | WO2008138623A1 Method for influencing the magnetic coupling between two bodies at a distance from each other and device for performing the method |
| 11/20/2008 | US20080284550 Variable Inductor |
| 11/20/2008 | CA2688134A1 Method for influencing the magnetic coupling between two bodies which are at a distance from one another, as well as an apparatus for carrying out the method |
| 11/18/2008 | US7454299 Device and method for detecting an end of a movement of a valve piston in a valve |
| 11/13/2008 | DE10331866B4 Einrichtung zur Steuerung einer Spulenanordnung mit elektrisch variierbarer Induktivität, sowie Schaltnetzteil Means for controlling a coil arrangement with electrically diversifiable inductance and switching power supply |
| 11/06/2008 | WO2008133972A1 Adjustable mid air gap magnetic latching solenoid |
| 11/06/2008 | WO2008103524A3 Linear variable differential transformer with complimentary step-winding secondary coils |
| 11/04/2008 | US7447492 On chip transformer isolator |
| 10/29/2008 | CN101295575A Great current bearable and continuously adjustable microinductor unit |
| 10/15/2008 | EP1844499B1 Use of superconductor components in thin layers as variable inductance and devices including said components and corresponding control method |
| 10/15/2008 | CN201134323Y Electromagnetic induction controlled direct driving reciprocating type high efficient transducer |
| 10/01/2008 | CN101277084A Method and apparatus for flexibly starting high voltage motor |
| 09/25/2008 | WO2008094919A3 Shielded power coupling device |
| 09/16/2008 | US7425884 Electrical device and method of producing the same |
| 09/16/2008 | US7425883 Magnetic element for multi-phase and method of manufacturing the same |
| 09/04/2008 | US20080211478 Frequency Controller Resonant Converter |
| 09/03/2008 | CN101256879A Electric impedance variable reactor |
| 08/27/2008 | CN101253586A Inductor device for multiband radio frequency operation |
| 08/07/2008 | CA2676004A1 Shielded power coupling device |
| 07/31/2008 | US20080180194 Central frequency adjustment device and adjustable inductor layout |
| 07/31/2008 | DE102008006140A1 Shielded power coupling device e.g. computed tomography scanner for medical applications, has shielding to inductive coupling efficiency increasing element when operated beyond predetermined power levels |
| 07/24/2008 | WO2008087207A2 Anisotropic magnetic elements for spintronic devices |
| 07/24/2008 | US20080176752 Laser trimming to tune the resonance frequency of a spiral resonator, the characteristics of a high temperature superconductor filter comprised of spiral resonators, or the resonance frequency of a planar coil |
| 07/23/2008 | CN201091026Y Great current inductance structure improvement |
| 07/23/2008 | CN101226815A Choke transformer without maintenance |
| 07/22/2008 | US7401398 Method of manufacturing a magnetic element for multi-phase |
| 07/16/2008 | CN100403462C Low-profile transformer and method of manufacturing the transformer |
| 07/09/2008 | CN101217247A Electric machine (motor and generator) device |
| 07/02/2008 | CN101212238A Signal distribution inductor |
| 06/25/2008 | CN201078795Y Assistant field excitation voltage-regulating transformer |
| 06/18/2008 | CN201075327Y Movable core type electric welding machine regulating current device |
| 06/18/2008 | CN201075326Y Movable core type electric welding machine regulating current device |
| 06/12/2008 | US20080136572 Micro-electromechanical switched tunable inductor |
| 06/12/2008 | US20080136569 Method and apparatus for coil-less magnetoelectric magnetic flux switching for permanent magnets |
| 06/05/2008 | US20080129296 Radio-frequency coil arrangement |
| 05/28/2008 | CN101188159A Segment adjustable inductor |
| 05/27/2008 | US7378828 DC-DC converter having magnetic feedback |
| 05/22/2008 | US20080119363 Use of Superconductor Components in Thin Layers as Variable Inductance and Devices Including Said Components and Corresponding Control Method |
| 05/21/2008 | CN201063943Y Dual-power automatic switchover type high-strength air discharge lamp (HID) ballast |
| 05/13/2008 | US7372254 Linear force detecting element formed without ferromagnetic materials which produces a resolution in a range of microns or less |
| 05/06/2008 | US7369010 Laser trimming to tune the resonance frequency of a spiral resonator, the characteristics of a high temperature superconductor filter comprised of spiral resonators, or the resonance of a planar coil |
| 04/17/2008 | WO2007121427A3 Electricity generating apparatus utilizing a single magnetic flux path |
| 04/17/2008 | US20080088399 Series impedance matched inductive power pick up |
| 04/17/2008 | DE102007032374A1 Filter mit einstellbarer Induktivität, Tapeverteilungssubstrat und Anzeigepanelaufbau Filter with adjustable inductance, tape distribution substrate and display panel set-up |
| 04/17/2008 | DE102006048742A1 Vorrichtung an einem Streckwerk einer Spinnereimaschine, insbesondere Strecke, Karde, Kämmmaschine o. dgl., zur Belastung der Streckwerkswalzen, mit mindestens einem Druckmittelzylinder Device at a drafting a spinning machine, in particular draw frame, card, comber o. The like., To stress the drafting rollers, with at least one hydraulic cylinder |
| 04/16/2008 | CN101161883A Apparatus on a drafting system of a spinning room machine, for weighting drafting system rollers |
| 03/27/2008 | US20080074227 Inductor topologies with substantial common-mode and differential-mode inductance |
| 03/26/2008 | EP1902450A1 Inductor device for multiband radio frequency operation |
| 03/20/2008 | WO2008031321A1 Inductive coupling coil and inductive coupling plasma apparatus thereof |
| 03/20/2008 | WO2008031320A1 Inductive coupling coil and inductive coupling plasma apparatus thereof |
| 03/20/2008 | US20080068119 Electric reactor of controlled reactive power and method to adjust the reactive power |
| 03/20/2008 | US20080068118 Method for adjusting mutual inductance and a transformer that implements the same |
| 03/19/2008 | EP1901317A1 Integrated magnetic device with piezoelectric control |
| 03/13/2008 | WO2008014506A3 Dual inductor circuit for multi-band wireless communication device |
| 03/13/2008 | US20080061916 Lateral Piezoelectric Driven Highly Tunable Micro-electromechanical System (MEMS) Inductor |
| 03/12/2008 | CN201036114Y Arc welder capable of adjusting current |
| 03/06/2008 | WO2008025759A1 Electrical component tuned by conductive layer deletion |
| 03/06/2008 | WO2008008643A3 Inductive sensor |
| 03/04/2008 | US7339453 Differential mode inductor with a center tap |
| 03/04/2008 | US7339298 Compliant motor driven variable electrical device |
| 02/21/2008 | DE102006038154A1 Verfahren zur Impulsübertragung und Schaltungsanordnung zur Durchführung dieses Verfahrens A method of pulse transmission and circuit arrangement for carrying out this method |
| 02/14/2008 | WO2007131796A3 Micromechanical actuators consisting of semiconductor compounds based on nitrides of main group iii elements |
| 02/07/2008 | DE10117291B4 Variabler Induktor Variable inductor |
| 01/31/2008 | WO2008014506A2 Dual inductor circuit for multi-band wireless communication device |
| 01/31/2008 | US20080024250 Coil block and electronic device using the same |
| 01/31/2008 | US20080024146 Resistance compensation circuit and memory device and method thereof |
| 01/29/2008 | US7323964 Non-contact power system with load and gap detection |
| 01/24/2008 | US20080018424 Inductive sensor |
| 01/24/2008 | US20080018390 Adjustable-inductance filter, tape distribution substrate comprising the filter, and display panel assembly comprising the tape distribution substrate |
| 01/17/2008 | WO2008008643A2 Inductive sensor |
| 01/17/2008 | WO2008007307A1 Programmable inductor |
| 01/17/2008 | US20080012673 Variable-Diameter Electromagnetic Coil |