| Patents for H01F 21 - Variable inductances or transformers of the signal type (1,432) |
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| 12/16/1986 | US4630013 Current controlled variable inductor |
| 11/20/1986 | EP0201846A1 Electromagnetic choke |
| 08/27/1986 | CN85101004A Differential transformer-displacement sensor of anti-high temperature and steam resistant |
| 08/19/1986 | CA1210100A1 Protection device for variable high power inductance for use at high frequency |
| 08/14/1986 | WO1986004731A1 Inductance coil sensor |
| 07/30/1986 | CN85100150A Long core differential transformer |
| 07/01/1986 | US4597169 Method of manufacturing a turnable microinductor |
| 03/25/1986 | US4577990 Coaxial coupling and locking mechanism |
| 02/19/1986 | EP0171690A1 Coil-configuration with magnetizable pin core |
| 01/08/1986 | EP0167293A1 Trimmable coil assembly and method |
| 01/08/1986 | CN85200983U Two-way contact voltage regulator |
| 12/24/1985 | US4560970 Variable transformer with multi-layer coil |
| 12/10/1985 | US4558295 Tunable-inductance magnetically-soft ferrite core structures |
| 12/04/1985 | EP0163364A1 Controlled inductive coupling device |
| 11/21/1985 | EP0161760A1 Electromechanical displacement transducer |
| 11/05/1985 | US4551699 Rotary variable differential transformer |
| 07/23/1985 | US4531109 Tuning coil structure |
| 07/16/1985 | US4529956 Combined transformer and variable inductor |
| 06/18/1985 | US4524341 Transformer with series-parallel-series winding between split winding |
| 06/11/1985 | US4523170 Adjustable air gap ferrite structures and methods of manufacture |
| 05/21/1985 | CA1187573A1 Inductive device |
| 05/14/1985 | US4517509 Inductive device |
| 04/16/1985 | US4511872 Inductance tuning means and methods of manufacture |
| 03/26/1985 | US4507638 Rotary position sensors employing planar coils |
| 02/26/1985 | USRE31840 Transformer for use in a static inverter |
| 11/21/1984 | EP0125296A1 Tunable-inductance magnetically-soft ferrite core structures and methods of manufacture |
| 11/21/1984 | EP0125292A1 Inductance tuning means and methods of manufacture |
| 11/14/1984 | EP0125085A1 Variable inductor mechanism |
| 11/14/1984 | EP0124602A1 Adjustable air gap ferrite structures and methods of manufacture |
| 10/09/1984 | CA1175877A1 Pincushion distortion correction apparatus |
| 09/11/1984 | US4471334 On-load tap-changing transformer |
| 08/07/1984 | US4464645 Angular displacement transducer of the variable reluctance type |
| 07/24/1984 | US4462015 Electromagnetic pick-off control handle |
| 05/23/1984 | EP0109096A1 Variable inductance device |
| 05/16/1984 | EP0108305A1 Bobbin arrangement for an adjustable coil |
| 05/10/1984 | WO1984001854A1 Adjustable air gap ferrite structures and methods of manufacture |
| 05/10/1984 | WO1984001853A1 Tunable-inductance magnetically-soft ferrite core structures and methods of manufacture |
| 05/10/1984 | WO1984001852A1 Inductance tuning means and methods of manufacture |
| 04/25/1984 | EP0106371A2 Variable inductance for a three-phase circuit |
| 04/24/1984 | US4445103 Rotary differential transformer with constant amplitude and variable phase output |
| 04/03/1984 | US4441092 Variable inductance with variable pickoff and variable flux medium permeability |
| 02/07/1984 | US4430632 Coaxial coupling and locking mechanism |
| 01/24/1984 | US4427961 Chip type high frequency coil device |
| 01/17/1984 | US4425702 Methods of fabricating a miniature high frequency coil assembly or transformer |
| 12/06/1983 | US4419648 Current controlled variable reactor |
| 10/18/1983 | CA1155505A1 Regulating winding connected in series with a main winding of a transformer |
| 10/18/1983 | CA1155276A1 Device for adjusting the inductance of a coil |
| 10/11/1983 | US4409523 Pincushion distortion correction apparatus |
| 10/05/1983 | EP0090703A1 Protection device for a high-frequency, high-power variable inductance |
| 10/04/1983 | US4408177 Variable inductor having extended useable frequency range |
| 09/20/1983 | CA1154111A1 Trimmable electrical inductors and method of making the same |
| 09/14/1983 | EP0088577A1 Improvements in variable inductors or resistors |
| 07/19/1983 | US4394636 Structure of a transformer |
| 07/12/1983 | US4393361 Variable magnetically biased linearity control |
| 07/12/1983 | US4393157 Variable inductor |
| 05/25/1983 | EP0079659A1 Inductive device |
| 05/03/1983 | CA1145822A1 Transformer for voltage regulators |
| 04/26/1983 | US4381506 Position-electrical signal transducer |
| 03/29/1983 | US4378247 Method of making sintered powdered aluminum inductor cores |
| 12/28/1982 | CA1138541A1 Modular air core coil assembly |
| 10/12/1982 | CA1133599A1 Transformer with varying voltage outputs |
| 09/07/1982 | CA1131313A1 Magnetic modulator differentially outputting magnetic core noise |
| 08/31/1982 | US4347491 Rotary variable differential transformer with substantially linear output |
| 08/17/1982 | US4345230 Multiple rotary variable differential transformer on common shaft with leakage flux compensation |
| 05/04/1982 | US4328475 Tuning core apparatus |
| 03/30/1982 | CA1120998A1 Magnetic circuit reluctance adjustment |
| 03/09/1982 | US4319209 Fine tuning coil having steel wire forming coil portion |
| 02/16/1982 | CA1118509A1 Inductance variable |
| 12/29/1981 | US4308512 Modular air core coil inductance assembly |
| 12/29/1981 | US4308495 Transformer for voltage regulators |
| 12/29/1981 | US4308003 Device for adjusting the inductance of a coil |
| 12/08/1981 | CA1114052A1 Device for processing high-frequency electrical signals |
| 11/17/1981 | CA1112730A2 High frequency circuit for operating a high-intensity, gaseous discharge lamp |
| 07/28/1981 | US4280270 Accelerated ageing |
| 07/08/1981 | EP0031322A1 High sensitivity magneto-inductance varying proportionally with the value of the magnetic field |
| 06/09/1981 | US4272724 Magnetic modulator for magnetic field detection differentially outputting magnetic core noise |
| 05/12/1981 | CA1101141A1 Planar printed circuit board arrangement useful in the uhf portion of a television tuner |
| 05/05/1981 | CA1100584A1 Variable differential transformer apparatus |
| 04/28/1981 | US4264683 Metallic inductor cores |
| 03/31/1981 | US4259716 Transformer for use in a static inverter |
| 03/17/1981 | US4257026 Adjustable linearity coil assembly |
| 02/24/1981 | US4253079 Displacement transducers employing printed coil structures |
| 02/10/1981 | CA1095601A1 Regulating transformer with magnetic shunt |
| 01/22/1981 | WO1981000170A1 High sensitivity magneto-industance varying proportionally with the value of the magnetic field |
| 01/20/1981 | CA1094195A2 Sensors for sensing a plurality of parameters |
| 01/13/1981 | US4245207 Miniature high frequency coil assembly or transformer |
| 12/09/1980 | US4237602 Method of manufacture of precision transducer for position measurements |
| 10/21/1980 | US4229722 Wire coil assembly for an electrical circuit |
| 09/09/1980 | US4222022 Variable inductor |
| 07/15/1980 | US4213106 Tuning apparatus and method of producing the same |
| 07/08/1980 | US4211993 Device for processing high-frequency electrical signals |
| 06/03/1980 | US4206434 Regulating transformer with magnetic shunt |
| 04/30/1980 | EP0010502A1 Variable inductance |
| 04/29/1980 | CA1076668A1 Coarse and fine adjustment warp coil |
| 03/25/1980 | US4194403 Push-button operated device for storing a plurality of positions of a movable member |
| 03/04/1980 | CA1073077A1 Positional transducer utilizing magnetic elements |
| 01/23/1980 | EP0007275A1 Adjustable inductance and transmitter comprising same |
| 12/18/1979 | US4179655 Moving coil instrument with linear characteristic |
| 11/14/1979 | EP0005386A1 Inductance with a ferrite pot core and method to adjust the reluctance of the core |
| 09/11/1979 | US4167719 Variable ratio transformer |