Inventor
Naoki Sakurai
Inventor
Hitachi, JP
Overview
Patents· 36 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H10Dprimary
H10DInorganic electric semiconductor devices19%
H10WGeneric packages, interconnections, connectors or other constructional details of devices covered by class h1018%
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 systems12%
H03KPulse technique11%
H02PControl or regulation of electric motors, electric generators or dynamo-electric converters7%
A61KPreparations for medical, dental or toiletry purposes4%
A61PSpecific therapeutic activity of chemical compounds or medicinal preparations4%
G01NInvestigating or analysing materials by determining their chemical or physical properties4%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests4%
C12NMicroorganisms or enzymes2%
PatentTitleYear
10,804,765Electromechanical integral motor202010,566,876Axial gap rotary electric machine202010,318,679Calculation method of switching waveform of the inverter and circuit simulation model20199,594,069'Texture indication measuring method and measuring devices'20178,399,466'Composition for regenerative treatment of cartilage disease'20138,299,836'Level shift circuit and power conversion unit'20128,252,794'Composition for regenerative treatment of cartilage disease'20127,973,405'Integrated circuit for driving semiconductor device and power converter'20117,957,167'Semiconductor element drive device with level shift circuit and apparatus including the same'20117,851,866'Electric power conversion device'20107,802,477'Oral sensation measuring device for foods'20107,763,974'Integrated circuit for driving semiconductor device and power converter'20107,679,944'Motor drive'20107,659,273'Composition for accelerating bone fracture healing'20107,070,946'Bone metabolism related protein and gene thereof'20066,875,798'Water based ink capable of decolorizing or discoloring and a process for the production of the same'20056,857,317'Device for measuring a food physicality and method for measuring the same'20056,180,966'Trench gate type semiconductor device with current sensing cell'20016,144,046'Power inverter having series connection of semiconductor devices each having an inverse parallel connection of an insulated gate bipolar transistor and a diode'20005,977,606'Dielectric isolated high voltage semiconductor device'19995,962,877'Inverter apparatus having improved switching element'19995,877,518'Semiconductor device and inverter apparatus using the semiconductor device'19995,747,829'Dielectric isolated high voltage semiconductor device'19985,701,018'Semiconductor device having parallel connection of an insulated gate bipolar transistor and a diode'19975,631,494'Power semiconductor device with low on-state voltage'19975,463,243'Dielectric isolated high voltage semiconductor device'19955,412,558'Semiconductor integrated circuit unit'19955,374,554'Microorganism and process for preparing D-biotin using the same'19945,343,052'Lateral insulated gate bipolar transistor'19945,278,443'Composite semiconductor device with Schottky and pn junctions'19945,274,541'Parallel circuit module including a diode and an IGBT'19935,253,156'Semiconductor integrated circuit unit'19935,166,760'Semiconductor Schottky barrier device with pn junctions'19925,126,806'Lateral insulated gate bipolar transistor'19925,101,244'Semiconductor schottky device with pn regions'19925,093,779'Computer file system'1992Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1992–2020Patents assigned to HITACHI LTD (27)· patent assignee history
1992–1995Patents assigned to HITACHI HARAMACHI SEMI CONDUCT (5)· patent assignee history
1992–2012Based in Hitachi, JP· patent location history
2005–2017Patents assigned to UNIV HIROSHIMA (3)· patent assignee history
2005–2020Based in Tokyo, JP· patent location history
2005–2010Based in Higashihiroshima, JP· patent location history
2010–2013Patents assigned to MITSUBISHI TANABE PHARMA CORP (3)· patent assignee history
2010–2013Based in Solana Beach, CA, US· patent location history
2012–2017Patents assigned to SAKURAI NAOKI (4)· patent assignee history
2017Based in Hiroshima, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HITACHI LTD | 27 | 1992–2020 |
| HITACHI HARAMACHI SEMI CONDUCT | 5 | 1992–1995 |
| SAKURAI NAOKIself | 4 | 2012–2017 |
| MITSUBISHI TANABE PHARMA CORP | 3 | 2010–2013 |
| UNIV HIROSHIMA | 3 | 2005–2017 |
Locations
| Location | Patents | Span |
|---|---|---|
| Hitachi, JP | 23 | 1992–2012 |
| Tokyo, JP | 4 | 2005–2020 |
| Solana Beach, California, US | 3 | 2010–2013 |
| Higashihiroshima, JP | 2 | 2005–2010 |
| Hiroshima, JP | 1 | 2017 |