Inventor
ROKUNOHE TOSHIAKI
JP20 patents
⚠️ This page may combine multiple inventors who share the name “ROKUNOHE TOSHIAKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
17 patentsUS6759616B2Jul 6, 2004
Gas insulated switchgear
HITACHI LTD22 citations92
US6680453B2Jan 20, 2004
Gas insulated switchgear
HITACHI LTD26 citations92
US6218627B1Apr 17, 2001
Bushing
HITACHI LTD31 citations92
US6424162B1Jul 23, 2002
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
HITACHI LTD22 citations91
US5982181ANov 9, 1999
Insulated device diagnosing system for diagnosing device based upon partial discharge signal data analyzed by frequency
HITACHI LTD29 citations91
US6661235B2Dec 9, 2003
Method and device for detecting a partial discharge in an electrical device
HITACHI LTD21 citations90
US9899172B2Feb 20, 2018
Circuit breaker and circuit breaker operating method
HITACHI LTD2 citations72
US9520699B2Dec 13, 2016
Switchgear
HITACHI LTD3 citations72
US10755442B2Aug 25, 2020
Oil leakage detector and oil leakage detection method and image processing unit
HITACHI LTD2 citations71
US9898830B2Feb 20, 2018
Oil leakage detector and oil leakage detection method
HITACHI LTD4 citations71
US5689088ANov 18, 1997
Gas insulated device, gas insulated switchgear, gas insulated bus line, and cable direct-coupled gas insulated switchgear
HITACHI LTD7 citations69
US10190935B2Jan 29, 2019
Gas leak detection device and gas leak detection method
HITACHI LTD2 citations68
US10615590B2Apr 7, 2020
Switch operating characteristic monitoring device, switch equipped with same, and switch operating characteristic monitoring method
HITACHI LTD1 citations59
US11494888B2Nov 8, 2022
Work terminal, oil leakage detection apparatus, and oil leakage detection method
HITACHI LTD0 citations51
US10509021B2Dec 17, 2019
Diagnosing device for on-load tap changing apparatus, diagnosing method for on-load tap changing apparatus, and diagnosing device for transformer
HITACHI LTD0 citations51
US11249137B2Feb 15, 2022
Diagnostic method of switchgear and device thereof
HITACHI LTD0 citations50
US10113933B2Oct 30, 2018
Leakage oil detector system and method
HITACHI LTD1 citations50