Inventor
Makoto Yatsu
Inventor
Tokyo, JP
Overview
Patents· 11 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H02Mprimary
H02MApparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use with mains or similar power supply systems19%
H02JElectric power networks16%
Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution10%
Y04SSystems integrating technologies related to power network operation, communication or information technologies for improving the electrical power generation, transmission, distribution, management or usage, i.e. smart grids10%
G05BControl or regulating systems in general6%
G06FElectric digital data processing6%
G06QInformation and communication technology [ict] specially adapted for administrative, commercial, financial, managerial or supervisory purposes6%
Y02BClimate change mitigation technologies related to buildings, e.g. housing, house appliances or related end-user applications6%
Y10TTechnical subjects covered by former us classification6%
G05FSystems for regulating electric or magnetic variables3%
PatentTitleYear
11,133,674System operation support device and method in power system, and wide-area monitoring protection control system202111,048,246Operation assistance device and operation assistance method202111,016,515System operation decision-making assistance device and method202110,892,640Voltage and reactive power monitoring/control device and method for calculating required reactive power amount for suppressing a fluctuation component and selecting an appropriate equipment202110,128,656Power assist unit and power assist system20189,979,283DC boosting circuit with at least one energy storage element20189,531,252'Snubber circuit'20169,479,080'Multilevel converter circuit for generating a plurality of voltage levels'20169,142,956'Multilevel power converter'20158,901,602'Power semiconductor device and power conversion system using the device'20145,892,675'AC current source circuit for converting DC voltage into AC current'1999Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1999–2016Patents assigned to FUJI ELECTRIC CO LTD (4)· patent assignee history
1999–2021Based in Tokyo, JP· patent location history
2014Patents assigned to TAKIZAWA SATOKI (1)· patent assignee history
2014Patents assigned to YATSU MAKOTO (1)· patent assignee history
2014–2016Based in Akiruno, JP· patent location history
2016–2018Patents assigned to SAMSUNG SDI CO LTD (3)· patent assignee history
2016–2018Based in Yongin-si, KR· patent location history
2018Based in Osaka, JP· patent location history
2021Patents assigned to HITACHI LTD (4)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| FUJI ELECTRIC CO LTD | 4 | 1999–2016 |
| HITACHI LTD | 4 | 2021 |
| SAMSUNG SDI CO LTD | 3 | 2016–2018 |
| TAKIZAWA SATOKI | 1 | 2014 |
| YATSU MAKOTOself | 1 | 2014 |
Locations
| Location | Patents | Span |
|---|---|---|
| Tokyo, JP | 5 | 1999–2021 |
| Akiruno, JP | 3 | 2014–2016 |
| Yongin-si, KR | 2 | 2016–2018 |
| Osaka, JP | 1 | 2018 |