| Patents for H01F 19 - Fixed transformers or mutual inductances of the signal type (1,296) |
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| 09/19/1995 | US5451914 Multi-layer radio frequency transformer |
| 08/09/1995 | CN2205049Y 大容量高频变压器 Large-capacity high-frequency transformer |
| 07/19/1995 | CN1105394A Nanocrystalline alloy having excellent pulse attenuation characteristics, method of producing the same, choke coil, and noise filter |
| 07/04/1995 | US5430895 Transformer circuit having microstrips disposed on a multilayer printed circuit board |
| 07/04/1995 | US5430424 Planar transformer |
| 06/14/1995 | DE4411894C1 Power impedance transformer for transistor push=pull power amplifiers |
| 06/08/1995 | WO1995015609A1 Dc/dc converter for low output voltages |
| 06/07/1995 | CN1028814C Molded transformer |
| 05/30/1995 | US5420558 Thin film transformer |
| 05/10/1995 | EP0652639A2 Driver circuit |
| 04/27/1995 | DE4336226A1 Line transformer |
| 03/28/1995 | CA2107052A1 High frequency off-line powder transformer |
| 03/01/1995 | EP0640241A1 Step switch. |
| 03/01/1995 | CN2190818Y Subminiature neutralizing transformer |
| 02/21/1995 | US5392020 Flexible transformer apparatus particularly adapted for high voltage operation |
| 02/14/1995 | US5390349 Plural transformers with elongated cores |
| 02/14/1995 | CA2038873C Transmission line transformer device |
| 01/31/1995 | US5385476 Magnetic circuits for communicating data |
| 01/25/1995 | EP0635853A2 Nanocrystalline alloy having pulse attenuation characteristics, method of producing the same, choke coil, and noise filter |
| 01/10/1995 | US5381084 Encasement for circuit having plural transformers |
| 01/04/1995 | EP0632654A1 Autotransformer for the transmission of baseband video |
| 11/29/1994 | US5369795 High frequency transformer and mixer using the same |
| 11/22/1994 | US5367273 Adapter for video and audio transmission |
| 11/08/1994 | US5363081 Line transformer and manufacturing process thereof |
| 11/08/1994 | US5363068 Autotransformer capable of passing a DC signal as well as a balanced output signal |
| 11/08/1994 | CA2024142C Balun transformers |
| 10/19/1994 | EP0518911B1 Circuits for the separate potential transmission of pulses of any length or frequency for driving transitor circuits |
| 10/05/1994 | EP0618595A1 Magnetic and electromagnetic circuit components having embedded magnetic material in a high density interconnect structure |
| 10/05/1994 | CN2178933Y Transformer special for super-thin programme controlled numerical switchboard |
| 10/04/1994 | US5353001 Hybrid integrated circuit planar transformer |
| 10/02/1994 | CA2120452A1 Magnetic and electromagnetic circuit components having embedded magnetic material in a high density interconnect structure |
| 09/13/1994 | US5345670 Method of making a surface-mount power magnetic device |
| 07/27/1994 | EP0608182A1 NCU circuit and facsimile apparatus |
| 06/29/1994 | EP0603909A1 Microwave tubular core transformer |
| 06/23/1994 | WO1994014174A1 Flexible transformer apparatus particularly adapted for high voltage operation |
| 06/22/1994 | EP0602838A1 Planar magnetic components |
| 06/15/1994 | EP0601791A1 Surface-mount power magnetic device and method of making the same |
| 06/15/1994 | CN1025096C Flyback transformer |
| 05/03/1994 | US5309120 RF high power, high frequency, non-integer turns ratio bandpass auto-transformer and method |
| 04/21/1994 | DE4302930C1 Wide band repeater for digital signals - has third conductor connected to inductance coil output via reactance to form resonance circuit |
| 04/21/1994 | DE4302929C1 Wide band repeater coil with two coaxial windings - connected in series with same winding sense to connection point forming induction coil output |
| 03/16/1994 | EP0587367A1 Adapter for video and audio transmission |
| 12/23/1993 | WO1993026062A1 Magnetic circuits for communicating data |
| 11/25/1993 | WO1993023861A1 Step switch |
| 09/01/1993 | CN1075817A Molded transformer |
| 07/15/1993 | DE4214789C1 Transformer for high frequency applications - has annular ferrite core wound with pair of wire coils with core and components mounted on PCB |
| 06/24/1993 | DE4213185A1 Transformer for UHF electrical signal - has planar form with coupling between symmetrical and non symmetrical lines. |
| 06/23/1993 | CN1073565A Flyback transformer |
| 06/15/1993 | US5220297 Transmission line transformer device |
| 06/01/1993 | US5216393 High frequency broadband tv signal transformer, especially for 47-860 mhz band |
| 05/19/1993 | DE4137776A1 Multilayer HF power transformer for resonant inverter - has soft magnetic core of which one limb passes through holes in multilayer boards carrying prim. and sec. winding tracks |
| 04/28/1993 | EP0539133A1 A transformer |
| 04/28/1993 | EP0425574A4 Transformer having symmetrical push-pull windings |
| 04/06/1993 | US5200731 Double insulated transformer of the coaxial type and method of assembling the same |
| 04/06/1993 | US5200718 Balun transformer with common mode coil |
| 03/10/1993 | EP0530576A1 High frequency transformer for SMD technique |
| 03/03/1993 | CN1069595A Thin film magnetic core memory and method making same |
| 01/23/1993 | CA2073283A1 Method of and article for containing chips from an amorphous metal core |
| 01/13/1993 | EP0522014A1 Cable coupling transformer. |
| 12/30/1992 | CN1019711B Superminiature communication insulated isolation transformer and device thereof |
| 12/23/1992 | EP0518911A1 Circuits for the separate potential transmission of pulses of any length or frequency for driving transitor circuits. |
| 12/08/1992 | US5170112 Power supply device for supplying power to a filament of a radar transmitter |
| 12/02/1992 | EP0516415A2 Planar transformer |
| 08/12/1992 | EP0498036A2 High-frequency broadband transducer |
| 08/05/1992 | EP0497556A1 Print coil device for double tuning circuit |
| 08/04/1992 | US5134770 Method of fabricating a high-frequency transformer |
| 07/14/1992 | CA1305225C Transformer with wire lead isolation slots |
| 07/14/1992 | CA1305224C Electronic inductor |
| 07/01/1992 | EP0491740A1 Matching transformer for high and medium frequency induction heating |
| 06/30/1992 | US5126971 Thin film magnetic core memory and method of making same |
| 06/30/1992 | US5126714 Integrated circuit transformer |
| 06/24/1992 | EP0491214A1 Transformer, in particulier switch mode transformer |
| 06/24/1992 | CN2108352U Winding frame for feedback transformer |
| 06/10/1992 | CN2107050U High-frequency transformer of high-frequency heating equipment |
| 05/07/1992 | DE4035209A1 Impedance converter for wideband transmission - has 2=part core wound with winding exhibiting required partial winding ratio |
| 04/21/1992 | US5107411 Interference free, pulse type transformer |
| 04/08/1992 | EP0479357A1 Power supply device |
| 04/07/1992 | US5103201 Switching mode power transformer |
| 04/04/1992 | CA2052032A1 Power supply device |
| 03/25/1992 | EP0476114A1 Low-profile planar transformer for use in off-line switching power supplies. |
| 03/04/1992 | CN1059231A Low-profile planar transformer for use in off-line switching power supplies |
| 03/03/1992 | US5093646 High frequency matrix transformer |
| 01/08/1992 | EP0464569A1 Symmetric transformer for transmission equipment |
| 12/05/1991 | DE4017263A1 Printed circuit HF amplifier with transformer - uses conductor bridges to select single or dual transformer output |
| 11/14/1991 | WO1991017555A1 Matching transformer for high and medium frequency induction heating |
| 10/29/1991 | US5061910 Balun transformers |
| 10/22/1991 | US5059839 Explosive magnetic field compression generator transformer power supply for high resistive loads |
| 10/17/1991 | WO1991015861A1 Low-profile planar transformer for use in off-line switching power supplies |
| 10/16/1991 | EP0301056B1 Microwave transformer |
| 10/03/1991 | WO1991015022A1 Cable coupling transformer |
| 09/19/1991 | WO1991014327A1 Circuits for the separate potential transmission of pulses of any length or frequency for driving transitor circuits |
| 09/18/1991 | CN2084898U 信号变压器 Signal Transformer |
| 09/11/1991 | CN2084646U Super small communication insulation isolated transformer and its device |
| 08/28/1991 | EP0443173A1 Wideband tunable monolithic inductor |
| 07/31/1991 | EP0438636A2 Double insulated transformer of the coaxial type and method of assembling the same |
| 07/31/1991 | CN1053510A Superminiature communication insulated isolation transformer and device thereof |
| 07/10/1991 | EP0436274A2 Thin film magnetic core memory and method of making same |
| 06/12/1991 | CN1012874B Unbalanced complete cut-off network |
| 05/08/1991 | EP0425574A1 Transformer having symmetrical push-pull windings |
| 05/02/1991 | WO1991006201A1 Integrated structure for a matrix transformer |