Inventor
HAYASHI KATSUNORI
JP28 patents
⚠️ This page may combine multiple inventors who share the name “HAYASHI KATSUNORI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
13 patentsUS5768117AJun 16, 1998
Power supply system for supplying electric power to a load through plural converters
HITACHI LTD167 citations99
US6879137B2Apr 12, 2005
Power-supply device
HITACHI LTD114 citations98
US6798180B2Sep 28, 2004
Power-supply device
HITACHI LTD48 citations96
US7170273B2Jan 30, 2007
Power-supply device and hard disk drive using same
HITACHI LTD22 citations92
US6643152B2Nov 4, 2003
DC power supply device
HITACHI LTD26 citations92
US6507507B2Jan 14, 2003
DC power supply device
HITACHI LTD41 citations92
US6381152B1Apr 30, 2002
Method of driving semiconductor switching device in non-saturated state and power supply apparatus containing such a switching device
HITACHI LTD32 citations92
US5638264AJun 10, 1997
Parallelized power supply system providing uninterrupted operation
HITACHI LTD40 citations92
US6496395B2Dec 17, 2002
Direct-current power-supply apparatus, control circuit thereof and semiconductor integrated circuit device for power supply
HITACHI LTD28 citations91
US7254742B2Aug 7, 2007
Disk array device and battery output control method for disk array device
HITACHI LTD17 citations84
US7548502B2Jun 16, 2009
Power backup method for disk storage device
HITACHI LTD7 citations74
US7038984B2May 2, 2006
Power backup method for disk array storage apparatus
HITACHI LTD2 citations63
US7667918B2Feb 23, 2010
Disk array device
HITACHI LTD3 citations61
IHI CORP
9 patentsUS11661886B2May 30, 2023
Variable capacity turbocharger
IHI CORP2 citations73
US11572823B2Feb 7, 2023
Variable capacity turbocharger
IHI CORP2 citations70
US12372024B2Jul 29, 2025
Turbocharger
IHI CORP1 citations64
US11939887B2Mar 26, 2024
Turbocharger with nozzle ring
IHI CORP0 citations61
US11913373B2Feb 27, 2024
Variable capacity turbocharger
IHI CORP0 citations60
US11162381B2Nov 2, 2021
Turbocharger
IHI CORP0 citations55
US12276226B2Apr 15, 2025
Electric turbocharger
IHI CORP0 citations52
US11846295B2Dec 19, 2023
Turbocharger
IHI CORP0 citations52
US11840942B2Dec 12, 2023
Variable capacity turbocharger
IHI CORP0 citations52