Inventor
Tomoaki Utsumi
Inventor
Hitachi, JP
Overview
Patents· 19 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H01Hprimary
H01HElectric switches52%
H02BBoards, substations or switching arrangements for the supply or distribution of electric power28%
G01RMeasuring electric variables14%
E05BLocks3%
H02GInstallation of electric cables or lines, or of combined optical and electric cables or lines3%
PatentTitleYear
9,437,380'Switching unit or switching gear'20168,975,550'Switch unit and switchgear'20158,872,054'Switch unit and switchgear equipped therewith'20148,710,388'Switchgear and method for operating switchgear'20148,247,725'Vacuum switchgear'20127,902,479'Vacuum switchgear'20117,244,903'Vacuum switchgear'20077,193,172'Gas-insulated switchgear tank'20077,064,267'Gas insulating apparatus and method for locating fault point thereof'20067,027,280'Gas insulating apparatus and method for locating fault point thereof'20066,884,940'Vacuum switchgear'20056,853,528'Gas insulating apparatus and method for locating fault point thereof'20056,850,399'Gas insulated device and failure rating method'20056,063,997'Gas insulated electric apparatus'20006,002,085'Gas insulated switchgear'19995,837,955'Gas circuit breaker'19985,728,989'Insulation gas filled circuit breaker'19985,256,976'Power apparatus and method of location of a fault in a power apparatus on the basis of attenuation coefficients of electromagnetic coefficients of fault generated electromagnetic waves'19935,146,170'Method and apparatus for locating an abnormality in a gas-insulated electric device'1992Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1992–2016Patents assigned to HITACHI LTD (18)· patent assignee history
1992–2015Based in Hitachi, JP· patent location history
2005–2007Based in Chiyoda-ku, JP· patent location history
2012–2015Patents assigned to UTSUMI TOMOAKI (4)· patent assignee history
2012–2014Patents assigned to MORITA AYUMU (3)· patent assignee history
2012–2015Patents assigned to SATO TAKASHI (3)· patent assignee history
2012–2014Patents assigned to TSUCHIYA KENJI (3)· patent assignee history
2016Based in Tokyo, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HITACHI LTD | 18 | 1992–2016 |
| UTSUMI TOMOAKIself | 4 | 2012–2015 |
| MORITA AYUMU | 3 | 2012–2014 |
| SATO TAKASHI | 3 | 2012–2015 |
| TSUCHIYA KENJI | 3 | 2012–2014 |
Locations
| Location | Patents | Span |
|---|---|---|
| Hitachi, JP | 16 | 1992–2015 |
| Chiyoda-ku, JP | 2 | 2005–2007 |
| Tokyo, JP | 1 | 2016 |