Inventor
Junnosuke Nakatsugawa
Inventor
Hitachi, JP
Overview
Patents· 20 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H02Pprimary
H02PControl or regulation of electric motors, electric generators or dynamo-electric converters52%
H02KDynamo-electric machines39%
F16CShafts4%
G11BInformation storage based on relative movement between record carrier and transducer4%
PatentTitleYear
10,811,950Linear motor and device provided with linear motor202010,411,549Rotating electric machine having protective cover for improving rotor20199,385,581'Magnetic gear mechanism'20169,337,708'Magnetic gear-type electric rotating machine'20169,143,025'Magnetic gear mechanism including a plurality of rotors or stators'20158,742,704'AC motor control device and AC motor driving system'20148,664,902'Polyphase AC motor, driving device and driving method therefor'20148,575,804'Magnetic gear'20138,513,842'Heat radiation structure for rotary electromotor'20138,502,425'Totally enclosed motor'20138,410,735'Torque ripple suppression control device for permanent magnet motor and electric power steering system'20138,362,727'Control device for synchronous motor'20138,044,618'Control apparatus for AC motor'20117,859,209'Control device for synchronous motor'20107,847,500'Synchronous motor control device'20107,825,620'Controller and constant measuring apparatus for AC motor'20107,224,133'Control apparatus, dual chip inverter and single chip inverter of AC motors'20076,828,752'Driving equipment and semiconductor equipment for alternating-current motor'20046,657,413'Driving equipment for synchronous motors'20036,570,358'Control apparatus for alternating-current motor'2003Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2003–2020Patents assigned to HITACHI LTD (15)· patent assignee history
2003–2016Based in Hitachi, JP· patent location history
2013–2016Patents assigned to NAKATSUGAWA JUNNOSUKE (10)· patent assignee history
2013–2016Patents assigned to IWASAKI NORIHISA (7)· patent assignee history
2013–2016Patents assigned to ENOMOTO YUJI (5)· patent assignee history
2013–2014Patents assigned to IWAJI YOSHITAKA (4)· patent assignee history
2016–2020Based in Tokyo, JP· patent location history
2019Based in Hitachinaka, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HITACHI LTD | 15 | 2003–2020 |
| NAKATSUGAWA JUNNOSUKEself | 10 | 2013–2016 |
| IWASAKI NORIHISA | 7 | 2013–2016 |
| ENOMOTO YUJI | 5 | 2013–2016 |
| IWAJI YOSHITAKA | 4 | 2013–2014 |
Locations
| Location | Patents | Span |
|---|---|---|
| Hitachi, JP | 17 | 2003–2016 |
| Tokyo, JP | 2 | 2016–2020 |
| Hitachinaka, JP | 1 | 2019 |