Inventor
TOKUYAMA TAKESHI
JP70 patents
⚠️ This page may combine multiple inventors who share the name “TOKUYAMA TAKESHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
17 patentsUS7978471B2Jul 12, 2011
Electric power conversion apparatus
HITACHI LTD68 citations98
US9137932B2Sep 15, 2015
Electric power conversion apparatus
HITACHI LTD12 citations93
US9042101B2May 26, 2015
Electric power conversion apparatus
HITACHI LTD16 citations93
US8917509B2Dec 23, 2014
Electric power conversion apparatus
HITACHI LTD11 citations93
US7812443B2Oct 12, 2010
Power semiconductor module for inverter circuit system
HITACHI LTD26 citations93
US7961472B2Jun 14, 2011
Electric circuit device, electric circuit module, and power converter
HITACHI LTD14 citations91
US10524398B2Dec 31, 2019
Electric power conversion apparatus
HITACHI LTD6 citations84
US9648791B2May 9, 2017
Electric power conversion apparatus
HITACHI LTD3 citations84
US8634220B2Jan 21, 2014
Power conversion apparatus
HITACHI LTD4 citations84
US7968925B2Jun 28, 2011
Power semiconductor module for inverter circuit system
HITACHI LTD14 citations84
US4005450AJan 25, 1977
Insulated gate field effect transistor having drain region containing low impurity concentration layer
HITACHI LTD19 citations74
US10856450B2Dec 1, 2020
Power conversion apparatus
HITACHI LTD2 citations73
US10238015B2Mar 19, 2019
Power conversion apparatus
HITACHI LTD1 citations73
US9609789B2Mar 28, 2017
Power conversion apparatus
HITACHI LTD3 citations73
US9583264B2Feb 28, 2017
Capacitor device and electrical power conversion device
HITACHI LTD2 citations73
US10966355B2Mar 30, 2021
Electric power conversion apparatus
HITACHI LTD0 citations63
US12469755B2Nov 11, 2025
Power module and power conversion device using the same
HITACHI LTD0 citations62
HITACHI AUTOMOTIVE SYSTEMS LTD
9 patentsUS10348214B2Jul 9, 2019
Power module, power converter device, and electrically powered vehicle
HITACHI AUTOMOTIVE SYSTEMS LTD13 citations92
US9729076B2Aug 8, 2017
Power module, power converter device, and electrically powered vehicle
HITACHI AUTOMOTIVE SYSTEMS LTD5 citations84
US9407163B2Aug 2, 2016
Power module, power converter device, and electrically powered vehicle
HITACHI AUTOMOTIVE SYSTEMS LTD4 citations84
US10818573B2Oct 27, 2020
Power semiconductor module with heat dissipation plate
HITACHI AUTOMOTIVE SYSTEMS LTD2 citations73
US10177676B2Jan 8, 2019
Power converter
HITACHI AUTOMOTIVE SYSTEMS LTD6 citations73
US9362261B2Jun 7, 2016
Power semiconductor module
HITACHI AUTOMOTIVE SYSTEMS LTD6 citations73
US10763190B2Sep 1, 2020
Power semiconductor module, power conversion device using same, and method for manufacturing power conversion device
HITACHI AUTOMOTIVE SYSTEMS LTD2 citations72
US10367426B2Jul 30, 2019
Power conversion device
HITACHI AUTOMOTIVE SYSTEMS LTD2 citations70
US9852962B2Dec 26, 2017
Waterproof electronic device and manufacturing method thereof
HITACHI AUTOMOTIVE SYSTEMS LTD3 citations69
TOKUYAMA TAKESHI
7 patentsUS8064234B2Nov 22, 2011
Power conversion apparatus
TOKUYAMA TAKESHI45 citations98
US8416574B2Apr 9, 2013
Electric power conversion apparatus
TOKUYAMA TAKESHI28 citations96
US9000553B2Apr 7, 2015
Power module and power converter containing power module
TOKUYAMA TAKESHI16 citations84
US8675364B2Mar 18, 2014
Power module and power conversion device
TOKUYAMA TAKESHI14 citations84
US8653652B2Feb 18, 2014
Semiconductor device, power semiconductor module and power conversion device equipped with power semiconductor module
TOKUYAMA TAKESHI12 citations84
US8503209B2Aug 6, 2013
Power conversion apparatus and cooling structure therefor
TOKUYAMA TAKESHI6 citations84
US8081472B2Dec 20, 2011
Electric circuit device, electric circuit module, and power converter
TOKUYAMA TAKESHI10 citations82
HITACHI ASTEMO LTD
6 patentsUS11139748B2Oct 5, 2021
Power module, power converter device, and electrically powered vehicle
HITACHI ASTEMO LTD4 citations84
US12184189B2Dec 31, 2024
Power conversion device
HITACHI ASTEMO LTD0 citations63
US11956933B2Apr 9, 2024
Power conversion device and motor-integrated power conversion device
HITACHI ASTEMO LTD0 citations63
US12581625B2Mar 17, 2026
Power conversion device
HITACHI ASTEMO LTD0 citations62
US12513826B2Dec 30, 2025
Power semiconductor device
HITACHI ASTEMO LTD0 citations62
US12301061B2May 13, 2025
Rotor of rotating electrical machine and electrical drive system
HITACHI ASTEMO LTD0 citations62
IBM
5 patentsUS5812997ASep 22, 1998
Method and apparatus for deriving an association rule between data
IBM61 citations95
US5991752ANov 23, 1999
Method and apparatus for deriving association rules from data and for segmenting rectilinear regions
IBM25 citations91
US5983222ANov 9, 1999
Method and apparatus for computing association rules for data mining in large database
IBM34 citations91
US5870748AFeb 9, 1999
Method and apparatus for deriving an optimized confidence rule
IBM13 citations72
US5729628AMar 17, 1998
Image segmenting method and apparatus
IBM5 citations63
YURA MASASHI
2 patentsNAKATSU KINYA
1 patentIDE EIICHI
1 patentTANAKA ELECTRONICS IND
1 patentTAKAGI YUSUKE
1 patentShowing the top 50 of 70 patents by PatentIndex Score.