Assignee
TOKO INC
JP242 patents
Top patents by PatentIndex Score
US5812045ASep 22, 1998
Inverter transformer
TOKO INC181 citations98
US6462509B1Oct 8, 2002
Non-contact charger
TOKO INC66 citations96
US5680034AOct 21, 1997
PWM controller for resonant converters
TOKO INC65 citations96
US5515257AMay 7, 1996
AC-DC converter
TOKO INC60 citations96
US5436550AJul 25, 1995
AC-DC converter having saw-tooth wave generating circuit in active filter
TOKO INC80 citations96
US4680528AJul 14, 1987
Battery charging device
TOKO INC173 citations96
US7042411B2May 9, 2006
Triaxial antenna coil
TOKO INC60 citations95
US5959443ASep 28, 1999
Controller circuit for controlling a step down switching regulator operating in discontinuous conduction mode
TOKO INC117 citations95
US7132905B2Nov 7, 2006
Input/output coupling structure for dielectric waveguide having conductive coupling patterns separated by a spacer
TOKO INC59 citations94
US6677837B2Jan 13, 2004
Dielectric waveguide filter and mounting structure thereof
TOKO INC64 citations94
US5991313ANov 23, 1999
Video transmission apparatus
TOKO INC55 citations94
US5440225AAug 8, 1995
Core for coil device such as power transformers, choke coils used in switching power supply
TOKO INC32 citations93
US6977560B2Dec 20, 2005
Input/output coupling structure for dielectric waveguide resonator
TOKO INC39 citations92
US6266254B1Jul 24, 2001
Switching power circuit
TOKO INC32 citations92
US5995390ANov 30, 1999
Power supply control device
TOKO INC17 citations92
US5740022AApr 14, 1998
Power factor improving circuit
TOKO INC26 citations92
US5489837AFeb 6, 1996
AC-DC converter having improved power factor to control feedback signal corresponding to output voltage of constant control circuit
TOKO INC31 citations92
US5457622AOct 10, 1995
AC-DC converter
TOKO INC35 citations92
US5440473AAug 8, 1995
AC-DC converter
TOKO INC49 citations92
US4629962ADec 16, 1986
Battery charging device
TOKO INC51 citations92
US4263643AApr 21, 1981
Switching regulator provided with error amplifier circuit having overcurrent protecting function
TOKO INC40 citations92
US7034607B2Apr 25, 2006
Switching constant-current power device
TOKO INC21 citations91
US6909249B2Jun 21, 2005
Switching constant-current power supply
TOKO INC45 citations91
US6201463B1Mar 13, 2001
Inverter transformer
TOKO INC28 citations91
US5689178ANov 18, 1997
Self-oscillation type DC-DC converter having a driving transistor connected in parallel to a circuit element for starting a switching element
TOKO INC36 citations91
US5359313AOct 25, 1994
Step-up transformer
TOKO INC106 citations91
US5111372AMay 5, 1992
DC-DC converter
TOKO INC38 citations91
US4442397AApr 10, 1984
Direct current power circuit
TOKO INC27 citations91
US6081075AJun 27, 2000
DC to AC switching circuit for driving an electroluminescent lamp exhibiting capactive loading characteristics
TOKO INC45 citations90
US7009470B2Mar 7, 2006
Waveguide-type dielectric filter
TOKO INC23 citations89
US6011382AJan 4, 2000
Circuit and method for directly regulating the output voltage of an electroluminescent lamp driver
TOKO INC41 citations89
US6850127B2Feb 1, 2005
Laminated electronic component
TOKO INC25 citations88
US5999066ADec 7, 1999
Interface module for a sending section and a receiving section
TOKO INC52 citations88
US5574357ANov 12, 1996
Switching power supply
TOKO INC20 citations88
US4272805AJun 9, 1981
Switching regulator provided with charge-discharge circuit having overcurrent protecting function and soft-start function
TOKO INC39 citations88
US6600362B1Jul 29, 2003
Method and circuits for parallel sensing of current in a field effect transistor (FET)
TOKO INC42 citations87
US5828206AOct 27, 1998
Serial control type voltage regulator
TOKO INC45 citations86
US5438289AAug 1, 1995
Comparator circuit
TOKO INC21 citations86
US4430595AFeb 7, 1984
Piezo-electric push button switch
TOKO INC76 citations86
US6164881ADec 26, 2000
Machine tool
TOKO INC61 citations85
US6031442AFeb 29, 2000
Electronic component
TOKO INC30 citations85
US5589884ADec 31, 1996
Adaptive quantization controlled by scene change detection
TOKO INC37 citations85
US5493329AFeb 20, 1996
Picture transmission system
TOKO INC20 citations85
US7923971B2Apr 12, 2011
Non-contact electric power transmission apparatus
TOKO INC10 citations84
US4506238AMar 19, 1985
Hybrid circuit device
TOKO INC35 citations84
US9190737B2Nov 17, 2015
Waveguide slot antenna
TOKO INC8 citations83
US6917528B2Jul 12, 2005
Switching power transmission device
TOKO INC12 citations83
US9647340B2May 9, 2017
Three-axis antenna
TOKO INC9 citations82
US8368482B2Feb 5, 2013
Dielectric waveguide-microstrip transition including a cavity coupling structure
TOKO INC7 citations82
US4630013ADec 16, 1986
Current controlled variable inductor
TOKO INC20 citations82
Showing the top 50 of 242 patents by PatentIndex Score.