Assignee
FDK CORP
JP199 patents
Top patents by PatentIndex Score
USD521166SMay 16, 2006
Flash light
FDK CORP54 citations95
USD866312SNov 12, 2019
Packaging for batteries
FDK CORP33 citations94
US7072191B2Jul 4, 2006
Switching power source circuit for independent per cycle control of ON/OFF time ratio
FDK CORP61 citations94
USD500377SDec 28, 2004
Headlamp
FDK CORP20 citations92
US6556117B1Apr 29, 2003
Multi-channel uniform output type transformer
FDK CORP35 citations92
US6262651B1Jul 17, 2001
Coil device
FDK CORP45 citations92
US6072702AJun 6, 2000
Ringing choke converter
FDK CORP25 citations92
US6023214AFeb 8, 2000
Sheet transformer
FDK CORP45 citations92
USD833384SNov 13, 2018
Battery holder
FDK CORP53 citations91
US6885278B2Apr 26, 2005
Microconverter and laminated magnetic-core inductor
FDK CORP25 citations91
US6270833B1Aug 7, 2001
Separator for an alkaline cell and a method of producing the separator
FDK CORP24 citations91
US5821008AOct 13, 1998
Battery provided with explosion-proof components
FDK CORP64 citations91
USD465045SOct 29, 2002
Flashlight
FDK CORP32 citations90
USD464454SOct 15, 2002
Portable lamp
FDK CORP46 citations89
US5929603AJul 27, 1999
Apparatus for preventing over-discharge
FDK CORP34 citations89
US5521741AMay 28, 1996
Polarization plane switch and optical switching device using the same
FDK CORP28 citations89
US7173182B2Feb 6, 2007
Signal transmission cable with connector
FDK CORP57 citations88
US6452473B1Sep 17, 2002
Multilayer inductor and method of manufacturing the same
FDK CORP51 citations87
USD866311SNov 12, 2019
Packaging for batteries
FDK CORP16 citations85
US7218196B2May 15, 2007
Noncontact coupler
FDK CORP12 citations84
US7605682B2Oct 20, 2009
Magnetic core type laminated inductor
FDK CORP17 citations83
US10097035B2Oct 9, 2018
Uninterruptible power supply unit
FDK CORP7 citations82
US7238449B2Jul 3, 2007
Nonaqueous electrolytic secondary battery and method of producing anode material thereof
FDK CORP12 citations82
US10110021B2Oct 23, 2018
Balancing device and electrical storage device
FDK CORP7 citations81
US7280264B2Oct 9, 2007
Magneto-optical device
FDK CORP11 citations81
US6573820B2Jun 3, 2003
Inductor
FDK CORP14 citations81
USD984268SApr 25, 2023
Battery tray
FDK CORP9 citations80
US6809622B2Oct 26, 2004
Coil Device
FDK CORP14 citations80
US8032574B2Oct 4, 2011
Probability generating apparatus
FDK CORP7 citations79
US7243117B2Jul 10, 2007
Random number generator and probability generator
FDK CORP15 citations79
US6900574B2May 31, 2005
Stepping motor
FDK CORP12 citations77
US6571631B1Jun 3, 2003
Displacement sensor and movement information collecting device comprising the same
FDK CORP7 citations74
US5982264ANov 9, 1999
High frequency sheet-type transformer
FDK CORP13 citations74
US11932466B2Mar 19, 2024
Battery packaging container
FDK CORP2 citations73
USD479014SAug 26, 2003
Flashlight
FDK CORP12 citations73
US6417952B1Jul 9, 2002
Faraday rotation angle varying device
FDK CORP11 citations73
US11936223B2Mar 19, 2024
Battery polarity determination circuit, charger, and electronic device
FDK CORP2 citations72
US11228186B2Jan 18, 2022
Charger having failure detection function and failure detection method
FDK CORP2 citations72
US10951048B2Mar 16, 2021
Charging circuit
FDK CORP4 citations72
US9640307B2May 2, 2017
Transformer
FDK CORP2 citations72
US6288827B1Sep 11, 2001
Faraday rotator
FDK CORP10 citations72
US6108120AAug 22, 2000
Faraday rotation angle varying apparatus
FDK CORP9 citations72
US5661394AAug 26, 1997
Switching power supply
FDK CORP15 citations72
US11387660B2Jul 12, 2022
Automatic charger
FDK CORP2 citations71
US7608366B2Oct 27, 2009
Nonaqueous electrolytic secondary battery and method of producing anode material thereof
FDK CORP6 citations71
US7006273B2Feb 28, 2006
Faraday rotation device and optical device using same
FDK CORP9 citations71
US6876480B2Apr 5, 2005
Farady rotation device and optical device comprising it
FDK CORP7 citations71
USD467376SDec 17, 2002
Combined flashlight and fluorescent lamp
FDK CORP7 citations71
US10797595B2Oct 6, 2020
Power supply and control method for power supply
FDK CORP2 citations70
US10404095B2Sep 3, 2019
Uninterruptible power supply unit
FDK CORP6 citations70
Showing the top 50 of 199 patents by PatentIndex Score.