| Patents for H01F 21 - Variable inductances or transformers of the signal type (1,432) |
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| 06/20/2001 | CN1300088A Mfg. method and apparatus for laminated electronic element |
| 06/07/2001 | WO2001041165A1 Process for variable inductor using nickel titanium and placement |
| 06/06/2001 | CN2433716Y 电感器 Inductor |
| 05/08/2001 | US6229424 Variable linearity coil |
| 04/18/2001 | CN1291779A Variable inductor element |
| 02/28/2001 | EP1079458A2 Variable inductance element |
| 02/14/2001 | EP1076345A2 Variable inductance element |
| 02/06/2001 | US6184755 Article comprising a variable inductor |
| 01/17/2001 | EP1069576A1 Article comprising a variable inductor |
| 01/17/2001 | EP1068631A1 Use of variable impedance having rotating core to control coil sputter distribution |
| 12/19/2000 | US6163238 Fast variable RF network inductor |
| 12/12/2000 | US6159817 Multi-tap thin film inductor |
| 11/09/2000 | WO2000066970A1 Electronic transducer for measuring flexion |
| 09/05/2000 | US6114938 Variable inductor device |
| 09/05/2000 | US6114934 Variable linearity coil |
| 06/06/2000 | US6072992 High-frequency device |
| 05/30/2000 | CA2198488C Printed circuit board inductor |
| 05/09/2000 | US6060972 Method and means for replacing an electrically conducting cable by another electrically conducting cable |
| 04/18/2000 | US6052571 Tuner for PSK or PAM data applications |
| 01/26/2000 | CN2360914Y Choke transformer |
| 12/28/1999 | US6008456 Load switch for a step switch |
| 12/21/1999 | US6005467 Trimmable inductor |
| 10/07/1999 | WO1999050884A1 Use of variable impedance having rotating core to control coil sputter distribution |
| 09/14/1999 | US5952896 Impedance matching network |
| 09/14/1999 | CA2184731C An electrically controllable inductor |
| 09/01/1999 | EP0939426A1 Magnetic core and deflection yoke having the same |
| 08/17/1999 | US5939965 Inductive component with variable magnetic performance |
| 06/29/1999 | US5917386 Printed circuit transformer hybrids for RF mixers |
| 06/23/1999 | CN1220542A Variable linearity coil |
| 06/22/1999 | US5914697 Method of fabricating radio device helical antennas |
| 06/09/1999 | CN1218965A Changeable linear coil |
| 05/26/1999 | CN1217552A Variable inducer |
| 05/19/1999 | EP0917162A2 Variable inductor device |
| 04/07/1999 | CN1213146A Adjustable saturable transformer |
| 02/09/1999 | US5870328 Bistable magnetic element and method of manufacturing the same |
| 12/02/1998 | EP0881647A1 Transformer with controlled interwinding coupling and controlled leakage inductances and circuit using such transformer |
| 11/25/1998 | CN1199910A Printed circuit transformer hybrids for mixers |
| 11/03/1998 | US5831432 Differential magneto-impedance magnetic field sensor |
| 10/07/1998 | EP0868734A1 Load switch for a step switch |
| 10/06/1998 | US5815918 Method for replacing an electrically conducting cable by another electrically conducting cable |
| 09/24/1998 | DE19810617A1 High frequency transformer hybrid for HF mixer in printed circuit, etc. |
| 08/19/1998 | EP0782754A4 Printed circuit board inductor |
| 08/13/1998 | WO1998035366A1 Trimmable inductor |
| 07/15/1998 | EP0853380A2 High efficiency impedance matching network |
| 06/23/1998 | US5770982 Self isolating high frequency saturable reactor |
| 06/17/1998 | EP0748471A4 An electrically controllable inductor |
| 05/19/1998 | US5754034 Electrically controllable inductor |
| 05/14/1998 | DE19646774A1 High frequency circuit equalisation method for television tuner |
| 03/25/1998 | EP0831549A1 Helical antenna and process for producing the same |
| 02/25/1998 | EP0825712A2 Electronically tuned matching networks using adjustable inductance elements and resonant tank circuits |
| 02/17/1998 | US5719544 Transformer with controlled interwinding coupling and controlled leakage inducances and circuit using such transformer |
| 01/06/1998 | US5705972 Substrate for an induction sensor |
| 12/23/1997 | US5701114 Rotary variable differential transformers |
| 12/10/1997 | EP0812066A1 High-frequency device |
| 11/04/1997 | US5684678 Resonant converter with controlled inductor |
| 10/09/1997 | WO1997037400A1 Helical antenna and process for producing the same |
| 10/08/1997 | EP0800185A1 Apparatus comprising at least one controllable inductance |
| 09/25/1997 | DE19611492A1 Determining position of turns and tuning gap between turns in air core coil |
| 09/24/1997 | EP0797223A1 Inductive component with tunable magnetic behaviour |
| 09/18/1997 | CA2200172A1 Inductive component with variable magnetic performance |
| 07/30/1997 | CN2258650Y Stepless changeable electric reactor |
| 07/09/1997 | EP0782754A1 Printed circuit board inductor |
| 07/03/1997 | WO1997023953A1 High-frequency device |
| 07/03/1997 | WO1997023888A1 Load switch for a step switch |
| 07/03/1997 | CA2241136A1 Load switch for a step switch |
| 07/02/1997 | CN2257396Y Short-circuit type adjustable inducer |
| 06/11/1997 | EP0778659A2 Resonant converter with controlled inductor |
| 06/05/1997 | WO1997020328A1 Controlled by-pass reactor |
| 06/04/1997 | CN2255657Y Signal receiving coil for small closed locomotive |
| 05/14/1997 | EP0773449A2 Magnetic field sensor |
| 05/13/1997 | US5629553 Variable inductance element using an inductor conductor |
| 05/07/1997 | DE19547873C1 Load changeover device for stage-transformer step switch |
| 04/03/1997 | DE19536267A1 Adjustable inductive electric component esp. SIMID choke |
| 04/02/1997 | EP0766440A1 Method and means for replacing an electrically conducting cable by another electrically conducting cable |
| 03/25/1997 | US5615091 Isolation power supply |
| 03/19/1997 | EP0763832A1 Bistable magnetic element and method of manufacturing the same |
| 03/13/1997 | DE19533050A1 Mfg. an inductive component having at least one coil e.g. for filters or oscillatory circuits |
| 12/18/1996 | EP0748471A1 An electrically controllable inductor |
| 11/12/1996 | US5574410 Impedance matching network |
| 11/12/1996 | US5572788 Coil device |
| 11/05/1996 | US5572170 Electronically tuned matching networks using adjustable inductance elements and resonant tank circuits |
| 10/30/1996 | CN2239068Y Power switch transformer for broadcast sending machine |
| 10/10/1996 | DE19523352C1 Current monitoring device e.g. for electric conductor in on-load tap-switch |
| 09/12/1996 | WO1996027891A1 Variable resistor, inductor or capacitor |
| 08/29/1996 | DE19516934C1 Inductive proximity switch with oscillator coil |
| 08/13/1996 | US5546065 High frequency circuit having a transformer with controlled interwinding coupling and controlled leakage inductances |
| 08/07/1996 | CN1128394A Transformer winding components with optimized distributed parameters |
| 07/16/1996 | US5537088 Structure of an induction sensor |
| 07/09/1996 | US5534837 Orthogonal-field electrically variable magnetic device |
| 06/12/1996 | EP0716432A1 Planar inductor |
| 06/05/1996 | EP0715323A1 Setting inductance value of magnetic components |
| 06/04/1996 | US5523673 Electrically controllable inductor |
| 04/02/1996 | US5504427 Rotational position sensor having variable coupling transformer |
| 03/07/1996 | WO1996007187A1 Printed circuit board inductor |
| 12/12/1995 | US5475347 Compact AC noise filter with ground inductor |
| 10/24/1995 | US5461353 Printed circuit board inductor |
| 09/20/1995 | CN2208266Y Screwed conductive rod for transformer |
| 09/08/1995 | WO1995024005A1 An electrically controllable inductor |
| 09/07/1995 | DE4406417A1 Inductive appts. for measurement of travel or angular movement |
| 08/16/1995 | EP0667052A1 Contactless battery charging system |