Inventor

Toshiaki Rokunohe

Inventor

Tokyo, JP

Overview

18→

Patents

1997–2020

Patent span

Electricity

Primary field (CPC H)

Patents· 18 as inventor

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

H01Hprimary

H01HElectric switches19%

G01RMeasuring electric variables14%

H02BBoards, substations or switching arrangements for the supply or distribution of electric power14%

G01MTesting static or dynamic balance of machines or structures6%

G01NInvestigating or analysing materials by determining their chemical or physical properties6%

G01VGeophysics6%

G06TImage data processing or generation, in general6%

H01FMagnets6%

H02GInstallation of electric cables or lines, or of combined optical and electric cables or lines6%

H04NPictorial communication, e.g. television6%

PatentTitleYear

10,755,442Oil leakage detector and oil leakage detection method and image processing unit2020 10,615,590Switch operating characteristic monitoring device, switch equipped with same, and switch operating characteristic monitoring method2020 10,509,021Diagnosing device for on-load tap changing apparatus, diagnosing method for on-load tap changing apparatus, and diagnosing device for transformer2019 10,190,935Gas leak detection device and gas leak detection method2019 10,113,933Leakage oil detector system and method2018 9,899,172'Circuit breaker and circuit breaker operating method'2018 9,898,830'Oil leakage detector and oil leakage detection method'2018 9,520,699'Switchgear'2016 8,804,298'Gas insulated bus and particle removal method for gas insulated bus'2014 7,256,584'Method and system for measuring partial discharge'2007 7,193,172'Gas-insulated switchgear tank'2007 6,759,616'Gas insulated switchgear'2004 6,680,453'Gas insulated switchgear'2004 6,661,235'Method and device for detecting a partial discharge in an electrical device'2003 6,424,162'Insulated device diagnosing system that prepares detection data from partial discharge signal such that periodic elements are given to different specific frequencies of the partial discharge signal'2002 6,218,627'Bushing'2001 5,982,181'Insulated device diagnosing system for diagnosing device based upon partial discharge signal data analyzed by frequency'1999 5,689,088'Gas insulated device, gas insulated switchgear, gas insulated bus line, and cable direct-coupled gas insulated switchgear'1997

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1997–2020Patents assigned to HITACHI LTD (16)· patent assignee history

1997–2014Based in Hitachi, JP· patent location history

2003–2007Based in Hitachinaka, JP· patent location history

2007Patents assigned to JAPAN AE POWER SYSTEMS CORP (2)· patent assignee history

2014Patents assigned to KATO TATSURO (1)· patent assignee history

2014Patents assigned to ROKUNOHE TOSHIAKI (1)· patent assignee history

2014Patents assigned to SHINOHARA RYOICHI (1)· patent assignee history

2016–2020Based in Tokyo, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
HITACHI LTD	16	1997–2020
JAPAN AE POWER SYSTEMS CORP	2	2007
KATO TATSURO	1	2014
ROKUNOHE TOSHIAKIself	1	2014
SHINOHARA RYOICHI	1	2014

Locations

Location	Patents	Span
Tokyo, JP	8	2016–2020
Hitachi, JP	5	1997–2014
Hitachinaka, JP	5	2003–2007