Inventor · disambiguated record
Tomoaki Utsumi
Also filed as: UTSUMI TOMOAKI
19 granted patents·1 pending application·231 citations·filing 1990–2013
95Inventor score
Top patents by PatentIndex Score
20 records- 0180US6850399B1Gas insulated device and failure rating methodHITACHI LTD·Filed 2000·Granted Feb 1, 2005·24 cites·16 claims
- 0279US7064267B2Gas insulating apparatus and method for locating fault point thereofHITACHI LTD·Filed 2005·Granted Jun 20, 2006·8 cites·4 claims
- 0376US8710388B2Switchgear and method for operating switchgearUTSUMI TOMOAKI·Filed 2010·Granted Apr 29, 2014·5 cites·17 claims
- 0475US8247725B2Vacuum switchgearMORITA AYUMU·Filed 2009·Granted Aug 21, 2012·9 cites·16 claims
- 0575US7193172B2Gas-insulated switchgear tankJAPAN AE POWER SYSTEMS CORP·Filed 2004·Granted Mar 20, 2007·22 cites·15 claims
- 0675US5146170AMethod and apparatus for locating an abnormality in a gas-insulated electric deviceHITACHI LTD·Filed 1990·Granted Sep 8, 1992·42 cites·16 claims
- 0774US6884940B1Vacuum switchgearHITACHI LTD·Filed 2004·Granted Apr 26, 2005·15 cites·12 claims
- 0871US8975550B2Switch unit and switchgearSUGAI DAISUKE·Filed 2012·Granted Mar 10, 2015·4 cites·13 claims
- 0970US8872054B2Switch unit and switchgear equipped therewithYAMAZAKI MIKI·Filed 2011·Granted Oct 28, 2014·5 cites·8 claims
- 1070US7902479B2Vacuum switchgearHITACHI LTD·Filed 2007·Granted Mar 8, 2011·5 cites·11 claims
- 1168US6002085AGas insulated switchgearHITACHI LTD·Filed 1994·Granted Dec 14, 1999·31 cites·9 claims
- 1267US7244903B2Vacuum switchgearHITACHI LTD·Filed 2005·Granted Jul 17, 2007·4 cites·2 claims
- 1365US5256976APower 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 wavesHITACHI LTD·Filed 1991·Granted Oct 26, 1993·25 cites·32 claims
- 1455US6853528B2Gas insulating apparatus and method for locating fault point thereofHITACHI LTD·Filed 2003·Granted Feb 8, 2005·6 cites·5 claims
- 1552US9437380B2Switching unit or switching gearHITACHI LTD·Filed 2013·Granted Sep 6, 2016·0 cites·22 claims
- 1649US7027280B2Gas insulating apparatus and method for locating fault point thereofHITACHI LTD·Filed 2005·Granted Apr 11, 2006·2 cites·2 claims
- 1749US6063997AGas insulated electric apparatusHITACHI LTD·Filed 1994·Granted May 16, 2000·14 cites·18 claims
- 1844US2006186091A1Gas-insulated switchgear tankJAPAN AE POWER SYSTEMS CORP·Filed 2006·Application pending·0 cites
- 1941US5728989AInsulation gas filled circuit breakerHITACHI LTD·Filed 1995·Granted Mar 17, 1998·7 cites·15 claims
- 2033US5837955AGas circuit breakerHITACHI LTD·Filed 1997·Granted Nov 17, 1998·3 cites·8 claims
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