Inventor
KAMIZUMA HIROSHI
JP22 patents
⚠️ This page may combine multiple inventors who share the name “KAMIZUMA HIROSHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
14 patentsUS9583264B2Feb 28, 2017
Capacitor device and electrical power conversion device
HITACHI LTD2 citations73
US10008953B2Jun 26, 2018
Power conversion device and power conversion method for power conversion device
HITACHI LTD5 citations72
US9917529B2Mar 13, 2018
Power conversion unit, power converter and method of manufacturing power converter
HITACHI LTD3 citations72
US9906154B2Feb 27, 2018
Power conversion unit and power conversion device
HITACHI LTD2 citations72
US9807913B2Oct 31, 2017
Cooling structure of heating element and power conversion device
HITACHI LTD3 citations72
US9437797B2Sep 6, 2016
Cooling structure of heating element and power conversion device
HITACHI LTD3 citations72
US9532489B2Dec 27, 2016
Power conversion device
HITACHI LTD2 citations62
US12034379B2Jul 9, 2024
Power conversion system
HITACHI LTD0 citations60
US12512385B2Dec 30, 2025
Power conversion apparatus
HITACHI LTD0 citations56
US12512766B2Dec 30, 2025
Power conversion device
HITACHI LTD0 citations51
US10141861B2Nov 27, 2018
Power conversion unit, power converter and method of manufacturing power converter
HITACHI LTD0 citations51
US9948201B2Apr 17, 2018
Power conversion apparatus including terminals having higher resistance portions
HITACHI LTD0 citations41
US9755526B2Sep 5, 2017
Power converter
HITACHI LTD0 citations40
US9497887B2Nov 15, 2016
Cooling structure for heating element and power converter
HITACHI LTD0 citations40