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Inventor

Kazuto Kawakami

Inventor
Tokyo, JP

Overview

16→
Patents
1988–2020
Patent span
Electricity
Primary field (CPC H)

Patents· 16 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

C22Cprimary
C22CAlloys18%
H02MApparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use with mains or similar power supply systems15%
H01FMagnets8%
H03KPulse technique8%
B22DCasting of metals5%
B22FWorking metallic powder5%
C21DModifying the physical structure of ferrous metals5%
H01MProcesses or means, e.g. batteries, for the direct conversion of chemical energy into electrical energy5%
Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution5%
Y02PClimate change mitigation technologies in the production or processing of goods5%
PatentTitleYear
10,533,242Steel for cold forging20209,595,376'Non-oriented electrical steel sheet and manufacturing method thereof'20179,085,817'Non-oriented electrical steel sheet and manufacturing method thereof'20158,840,734'Non-oriented electrical steel sheet'20148,567,233'Gas charge container, atom probe apparatus, and method for analyzing hydrogen position in material'20138,562,906'Lead-free solder alloy, solder ball and electronic member, and lead-free solder alloy, solder ball and electronic member for automobile-mounted electronic member'20138,304,141'Stainless steel, titanium, or titanium alloy solid polymer fuel cell separator and its method of production and method of evaluation of warp and twist of separator'20127,807,281'Stainless steel, titanium, or titanium alloy solid polymer fuel cell separator and its method of production and method of evaluation of warp and twist of separator'20106,643,150'Control device for power converter'20036,507,505'Power conversion device'20036,229,722'Multiple inverter system'20015,929,665'Power converter with voltage drive switching device monitored by device parameters and electric parameters'19995,621,257'Gate drive circuit for voltage-driven type power switching device'19975,191,519'Current sharing control in a parallel inverter system'19934,752,705'Off-gate circuit for a GTO thyristor'19884,721,861'Turbine helper drive apparatus'1988

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1988–2003Patents assigned to TOSHIBA KK (8)· patent assignee history
1988–2017Based in Tokyo, JP· patent location history
1988–1993Based in Fuchu, JP· patent location history
2010–2020Patents assigned to NIPPON STEEL CORP (2)· patent assignee history
2010–2012Patents assigned to SINTOKOGIO LTD (2)· patent assignee history
2010–2013Based in Futtsu, JP· patent location history
2012–2015Patents assigned to KAWAKAMI KAZUTO (4)· patent assignee history
2013–2020Patents assigned to NIPPON STEEL & SUMITOMO METAL CORP (5)· patent assignee history
2020Based in Kisarazu, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
TOSHIBA KK81988–2003
NIPPON STEEL & SUMITOMO METAL CORP52013–2020
KAWAKAMI KAZUTOself42012–2015
NIPPON STEEL CORP22010–2020
SINTOKOGIO LTD22010–2012
Locations
LocationPatentsSpan
Tokyo, JP101988–2017
Futtsu, JP32010–2013
Fuchu, JP21988–1993
Kisarazu, JP12020