Patents
Sitemap › H01 - Basic electric elements › H01F - Magnets; Inductances; Transformers; Selection of materials for their magnetic properties › H01F 37 - Fixed inductances not covered by group
Patents for H01F 37 - Fixed inductances not covered by group (2,202)
06/1999
06/10/1999WO1999028931A2 A reactor
05/1999
05/19/1999EP0917163A2 Magnetic component assembly
05/18/1999CA2180992C High current, low profile inductor and method for making same
05/11/1999US5903450 Electrostatic precipitator power supply circuit having a T-filter and pi-filter
05/06/1999WO1999022385A1 Electric power transmission device
05/06/1999DE19746919A1 Elektrische Übertragungsvorrichtung Electric transmission device
05/05/1999CN1215900A Inductor and method of manufacturing the same
04/1999
04/22/1999WO1999019889A1 Radio interference suppression choke
04/14/1999CA2249827A1 Magnetic component assembly
03/1999
03/09/1999CA2147293C Compound inductors for use in switching regulators
03/03/1999CN1209687A Harmonic current attenuation device for electric motor
01/1999
01/27/1999CN1206491A Choke coil
01/21/1999WO1999003116A1 Coil
12/1998
12/22/1998US5850682 Method of manufacturing chip-type common mode choke coil
12/15/1998US5850336 Apparatus having an inverter
12/02/1998CN1200836A Ballast for discharge lamp and method and apparatus for mfg. same
12/01/1998US5844460 Wound, solid state inductor
11/1998
11/24/1998US5841335 Choke coil
11/03/1998US5831505 Choke coil
10/1998
10/28/1998EP0873568A1 Ballast for discharge lamp and method and apparatus for manufacturing the same
10/20/1998US5825272 Choke coil for suppressing common-mode noise and normal-mode noise
10/13/1998US5821844 D.C. reactor
10/07/1998EP0869518A1 Choke coil
10/07/1998CN2293890Y Half-core dry type reactor
09/1998
09/29/1998US5815060 Inductance element
09/29/1998CA2024289C Current limiting electrical reactor
09/24/1998WO1998041997A1 Electrical choke
09/24/1998CA2283899A1 Electrical choke for power factor correction
09/09/1998EP0862783A1 Inductive component
09/03/1998DE19707177A1 Choke coil inductance for electric circuit
08/1998
08/27/1998WO1998029934A3 Electric motor
08/19/1998EP0858667A1 Choke
08/11/1998US5793273 Choke coil for suppressing common-mode noise and normal-mode noise
07/1998
07/09/1998WO1998029934A2 Electric motor
06/1998
06/25/1998DE19652186A1 Elektrischer Motor Electric Motor
06/17/1998CN1185011A Choke coil
05/1998
05/12/1998US5751207 Noise suppression chokes
05/07/1998WO1998019318A1 Inductor
05/07/1998CA2268716A1 Inductor
05/05/1998US5748064 Low profile reactor
04/1998
04/30/1998WO1998018143A1 Choke coil
04/29/1998CN1180444A Two-stage high voltage inductor
04/14/1998US5740024 Two-stage, high voltage inductor
03/1998
03/25/1998CN1177191A Choke coil
02/1998
02/19/1998DE19633197A1 Manufacture of electrical inductive devices e.g. coil and core assemblies for mounting on circuit boards
02/12/1998WO1998006113A1 Choke
02/04/1998EP0822658A1 Inductor assembly and method of making same
01/1998
01/28/1998EP0821375A1 Use of a suppression choke in switching power supplies
01/28/1998CN1171607A Choke coil for suppressing common-mode noise and normal-mode noise
01/21/1998CN1170945A Choke coil for suppressing common-mode noise and normal-mode noise
12/1997
12/31/1997CN1169062A High voltage noise filter and magnetron device using it
12/11/1997DE19723640A1 Inductor coil for suppressing in phase and antiphase noise
11/1997
11/27/1997DE19720394A1 Choke coil for suppressing common mode and auto-oscillation interference e.g.for electronic equipment with power source
11/06/1997DE19714977A1 Device with inverter e.g. for machine tools, lifts, air-conditioning, pumps and printing presses
10/1997
10/28/1997US5682292 Liquid-cooled valve reactor
10/01/1997EP0798950A2 High voltage noise filter and magnetron device using it
09/1997
09/24/1997EP0797224A1 Choke coil for an intermediate circuit short-circuit device
09/24/1997CN2263391Y Four-in-one differential circuit paralleling reactor
09/10/1997EP0794538A1 Toroidal core for inductance, in particular for radio interference suppression of phase-controllable semiconductor circuits
06/1997
06/25/1997EP0780854A1 Current-compensated radio interference suppression choke
06/12/1997DE19542529C1 Fixed choke arrangement for testing HV systems e.g. gas-insulated switchgear or cables
06/03/1997US5635890 Choke coil
05/1997
05/29/1997WO1997019458A1 Inductive component
05/13/1997US5629842 Two-stage, high voltage inductor
05/13/1997US5629661 Choke coil for eliminating common mode noise and normal mode noise
04/1997
04/17/1997DE19537832A1 System of choke coils on common core e.g. for mains-driven converter connection
04/16/1997CN1147681A Multi-layer opened hollow inductor coil
04/02/1997CN2251241Y 镇流器 Ballast
03/1997
03/20/1997WO1997010608A1 Ballast for discharge lamp and method and apparatus for manufacturing the same
03/19/1997CN2249960Y 高压钠灯镇流器 High pressure sodium lamp ballasts
01/1997
01/22/1997CN2245799Y Resin insulating dry iron core shunt reactor
12/1996
12/27/1996EP0698277B1 Liquid-cooled valve choke
12/24/1996US5587694 Reactor with core gap spacers
12/03/1996US5581224 Choke coil for eliminating common mode noise and differential mode noise
11/1996
11/27/1996EP0744757A1 D.c. reactor
10/1996
10/30/1996CN1134590A Choke coil
10/23/1996CN1134028A Choke coil
10/23/1996CN1134027A Choke coil
10/10/1996WO1996031889A1 Two-stage, high voltage inductor
10/10/1996CA2215136A1 Two-stage, high voltage inductor
09/1996
09/03/1996US5552756 Chip-type common mode choke coil
08/1996
08/08/1996DE19603785A1 Electrical inductance with low noise generation
08/08/1996DE19603784A1 Electrical inductance with reduced noise
08/08/1996DE19603779A1 Electrical inductance with reduced noise generation
07/1996
07/24/1996CN1127568A Choke coil
06/1996
06/13/1996WO1996018198A1 D.c. reactor
06/11/1996US5525951 Choke coil
05/1996
05/22/1996CN2227869Y Outdoor dry hollow parallel reactor
05/17/1996WO1996014644A1 Filter choke
04/1996
04/25/1996DE19537882A1 Choking coil
04/10/1996EP0706192A1 Choke coil
04/09/1996US5506559 Choke coil for eliminating common mode noise and normal mode noise
03/1996
03/20/1996CN2222958Y Arched window iron-core ballast
02/1996
02/28/1996EP0698277A1 Liquid-cooled valve choke
02/28/1996CN2221285Y Low energy consumption electronic ballast
02/07/1996CN2219536Y Ring Choker
01/1996
01/02/1996US5481238 Compound inductors for use in switching regulators
11/1995
11/16/1995DE4421915A1 Metal encapsulated fixed choke device
11/15/1995EP0682395A2 Device for limiting the rate of change of currents and voltages between conductors or to earth and use thereof
11/08/1995CN2212253Y Stabilizing ballast for daylight lamp
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