Inventor
Hajime Urai
Inventor
Tokyo, JP
Overview
Patents· 13 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H01Hprimary
H01HElectric switches81%
H02BBoards, substations or switching arrangements for the supply or distribution of electric power13%
H02KDynamo-electric machines6%
PatentTitleYear
10,916,394Gas circuit breaker202110,699,863Gas circuit breaker202010,354,821Gas circuit breaker201910,256,060Gas circuit breaker201910,199,188Gas circuit breaker201910,157,719Gas circuit breaker20189,959,999Method for controlling power switching apparatus20189,899,172'Circuit breaker and circuit breaker operating method'20189,870,884'Gas circuit breaker'20189,620,315'Gas circuit breaker'20179,520,699'Switchgear'20169,336,974'Gas circuit breaker'20167,339,132'Method of current interruption using puffer type gas circuit breaker with combined-action of cylinder and piston'2008Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2008Patents assigned to JAPAN AE POWER SYSTEMS CORP (1)· patent assignee history
2008Based in Hitachi, JP· patent location history
2016–2021Patents assigned to HITACHI LTD (12)· patent assignee history
2016–2021Based in Tokyo, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HITACHI LTD | 12 | 2016–2021 |
| JAPAN AE POWER SYSTEMS CORP | 1 | 2008 |
Locations
| Location | Patents | Span |
|---|---|---|
| Tokyo, JP | 12 | 2016–2021 |
| Hitachi, JP | 1 | 2008 |