Inventor
NAGAI TAMIJI
JP40 patents
⚠️ This page may combine multiple inventors who share the name “NAGAI TAMIJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SONY CORP
37 patentsUS6124700ASep 26, 2000
Charging method, charging equipment, and integrated circuit
SONY CORP112 citations98
US5991170ANov 23, 1999
Equipment and method for transmitting electric power
SONY CORP134 citations98
US5783322AJul 21, 1998
Secondary battery pack
SONY CORP73 citations96
US5760570AJun 2, 1998
Rechargeable battery apparatus
SONY CORP63 citations96
US5691620ANov 25, 1997
Battery charging method
SONY CORP118 citations96
US6057609AMay 2, 2000
Auxiliary power supply apparatus
SONY CORP63 citations95
US5680027AOct 21, 1997
Battery pack including internal capacity monitor for monitoring groups of battery cells
SONY CORP85 citations95
US7193390B2Mar 20, 2007
Apparatus for connecting secondary battery cells in series and method for controlling secondary battery cells connected in series
SONY CORP41 citations92
US7023180B2Apr 4, 2006
Charging apparatus and method for a secondary battery of a portably electronic device
SONY CORP18 citations92
US6326768B2Dec 4, 2001
Method, apparatus and battery pack for charging and discharging secondary batteries
SONY CORP49 citations92
US6291965B1Sep 18, 2001
Battery charger
SONY CORP23 citations92
US6169341B1Jan 2, 2001
Power supplying adapter, electronic equipment, and signal transmission system
SONY CORP23 citations92
US6118255ASep 12, 2000
Charging apparatus, secondary battery apparatus, charging system, and charging method
SONY CORP52 citations92
US6066939AMay 23, 2000
Secondary battery pack
SONY CORP26 citations92
US6028415AFeb 22, 2000
Charging control method and charging control device
SONY CORP52 citations92
US5982151ANov 9, 1999
Battery charger and battery charging method
SONY CORP37 citations92
US5982153ANov 9, 1999
Charger system switchably connects a smoothing capacitor and resistor and charging controller based on a detected secondary battery voltage
SONY CORP29 citations92
US5796238AAug 18, 1998
Battery pack
SONY CORP48 citations92
US4242714ADec 30, 1980
Current control circuit
SONY CORP44 citations92
US4206388AJun 3, 1980
Current control circuit for horizontal deflection coil of television receiver
SONY CORP46 citations92
US6465913B1Oct 15, 2002
Power source unit
SONY CORP22 citations91
US7436644B2Oct 14, 2008
Switching circuit, switching method, protective device and battery pack
SONY CORP11 citations82
US6552562B2Apr 22, 2003
Current detecting apparatus and its control method
SONY CORP8 citations74
US6373724B2Apr 16, 2002
Power supply apparatus
SONY CORP10 citations74
US4027200AMay 31, 1977
High voltage generating circuit
SONY CORP14 citations74
US7023179B2Apr 4, 2006
Charging apparatus and charging method
SONY CORP7 citations73
US6956357B2Oct 18, 2005
Charging apparatus and charging method
SONY CORP10 citations73
US6949913B2Sep 27, 2005
Charging apparatus and charging method
SONY CORP4 citations73
US6961255B2Nov 1, 2005
Switching power supply using controlled negative feedback in series with a switching device and responsive to the voltage and/or current to a load
SONY CORP4 citations63
US6917530B2Jul 12, 2005
Switching power supply using controlled negative feedback in series with a switching device and responsive to the voltage and or current to a load
SONY CORP1 citations63
US6462972B2Oct 8, 2002
Power source apparatus for providing a power source in a standby mode and a pulse generating apparatus
SONY CORP3 citations63
US6452820B2Sep 17, 2002
Power supplying apparatus and method having a primary side insulated from a secondary side
SONY CORP5 citations63
US4393337AJul 12, 1983
Switching circuit
SONY CORP6 citations63
US7202633B2Apr 10, 2007
Driving circuit for field effect transistor
SONY CORP2 citations61
US6956754B2Oct 18, 2005
Switching power supply using controlled negative feedback in series with a switching device and responsive to the voltage and/or current to a load
SONY CORP0 citations52
US4390818AJun 28, 1983
Television receiver
SONY CORP1 citations52
US6650090B2Nov 18, 2003
Battery pack and signal transmission system
SONY CORP0 citations48