Inventor
YAHATA KOICHI
JP17 patents
⚠️ This page may combine multiple inventors who share the name “YAHATA KOICHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
5 patentsUS7561429B2Jul 14, 2009
Power converter unit
HITACHI LTD77 citations95
US7719838B2May 18, 2010
Power inverter
HITACHI LTD28 citations92
US7561448B2Jul 14, 2009
Power inverter
HITACHI LTD37 citations92
US8040088B2Oct 18, 2011
Power inverter
HITACHI LTD4 citations62
US7859105B2Dec 28, 2010
Power converter, power system provided with same, and mobile body
HITACHI LTD6 citations61
HITACHI ASTEMO LTD
4 patentsUS11671089B2Jun 6, 2023
Load driver
HITACHI ASTEMO LTD0 citations53
US12512746B2Dec 30, 2025
Gate drive circuit and power conversion device
HITACHI ASTEMO LTD0 citations52
US11757444B2Sep 12, 2023
Semiconductor element drive device and power conversion apparatus
HITACHI ASTEMO LTD0 citations52
US12257910B2Mar 25, 2025
Power conversion apparatus
HITACHI ASTEMO LTD0 citations44