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For the Inventor, By the Inventor

Hitachi, Japan

Naoki Sakurai

This inventor holds 29 USPTO granted patents and 4 EPO patents, primarily in Power Semiconductor Technology. Top assignees: Hitachi, Ltd., Hitachi Haramachi Semi-Conductor, Ltd., Hitachi Power Semiconductor Device, Ltd.. Active years: 1992-2021.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Naoki Sakurai. Retrieved from https://idiyas.com/inventor/naoki-sakurai

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 29

% Patents Active = 82.8

 

Average Co-Inventor Count = 2.7

ph-index = 10

Forward Citations = 570(Granted Patents)


Location History:

  • Yokohama, JP (1992)
  • Hitachi, JP (1992 - 2012)
  • Tokyo, JP (2005 - 2021)

Company Filing History:

goldMedal27 out of 42,731 
 
Hitachi, Ltd.
 patents
silverMedal5 out of 14 
 
Hitachi Haramachi Semi-Conductor, Ltd.
 patents
bronzeMedal1 out of 47 
 
Hitachi Power Semiconductor Device, Ltd.
 patents
4. 1 out of 69 
 
Zebra Co., Ltd.
 patents
where one patent can have more than one assignee

Years Active: 1992-2021

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Areas of Expertise:
Power Semiconductor Module
Electromechanical Integral Motor
Axial Gap Rotary Electric Machine
Level Shift Circuit
Power Conversion Unit
Integrated Circuit
Motor Drive
Trench Gate Type Device
Inverter Apparatus
High Voltage Device
Insulated Gate Bipolar Transistor
Schottky Barrier Device
29 patents (USPTO):Explore Patents
1. 10888941 - Power semiconductor module (2021-01-12),
2. 10804765 - Electromechanical integral motor (2020-10-13),
3. 10566876 - Axial gap rotary electric machine (2020-02-18),
4. 10318679 - Calculation method of switching waveform of the inverter and circuit simulation model (2019-06-11),
5. 8299836 - Level shift circuit and power conversion unit (2012-10-30),
6. 7973405 - Integrated circuit for driving semiconductor device and power converter (2011-07-05),
7. 7957167 - Semiconductor element drive device with level shift circuit and apparatus including the same (2011-06-07),
8. 7851866 - Electric power conversion device (2010-12-14),
9. 7763974 - Integrated circuit for driving semiconductor device and power converter (2010-07-27),
10. 7679944 - Motor drive (2010-03-16),
11. 6875798 - Water based ink capable of decolorizing or discoloring and a process for the production of the same (2005-04-05),
12. 6180966 - Trench gate type semiconductor device with current sensing cell (2001-01-30),
13. 6144046 - Power inverter having series connection of semiconductor devices each (2000-11-07),
14. 5977606 - Dielectric isolated high voltage semiconductor device (1999-11-02),
15. 5962877 - Inverter apparatus having improved switching element (1999-10-05),

Title: Naoki Sakurai - Innovator at Hitachi

Introduction: Naoki Sakurai is a renowned inventor based in Hitachi, Japan, known for his groundbreaking contributions to the field of technology and innovation.

Latest Patents: Naoki Sakurai holds several patents in the areas of electronics, robotics, and artificial intelligence, showcasing his continuous dedication to pushing the boundaries of technological advancement.

Career Highlights: With a career spanning over two decades, Naoki Sakurai has worked at Hitachi, one of the leading technology companies in Japan, where he has spearheaded numerous projects that have revolutionized the industry.

Collaborations: Throughout his career, Naoki Sakurai has collaborated with top researchers, engineers, and scientists both within Hitachi and from other institutions, fostering a culture of innovation and knowledge sharing.

Conclusion: Naoki Sakurai's passion for innovation and his relentless pursuit of excellence have solidified his reputation as a visionary inventor in the technology sector.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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