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For the Inventor, By the Inventor

Tokyo, Japan

Toshiyuki Fujii

This inventor holds 74 USPTO granted patents and 5 published patent applications and 16 EPO patents, primarily in Power Conversion Technology. Top assignees: Mitsubishi Electric Corporation, Mitsubishi Denki Kabushiki Kaisha, Toshiba Mitsubishi-Electric Industrial Systems Corporation. Active years: 1980-2026.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Toshiyuki Fujii. Retrieved from https://idiyas.com/inventor/toshiyuki-fujii

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

Calculating rank
USPTO Granted Patents = 74 

% Patents Active = 94.6

 

Average Co-Inventor Count = 3.1

ph-index = 7

Forward Citations = 185(Granted Patents)

Forward Citations (Not Self Cited) = 149(Dec 10, 2025)


Location History:

  • Itami, JP (1980)
  • Hyogo, JP (1996 - 1998)
  • Hachioji, JP (2019)
  • Chiyoda-ku, JP (2017 - 2022)
  • Tokyo, JP (1999 - 2024)
  • Machida, JP (2020 - 2024)

Company Filing History:

goldMedal51 out of 16,627 
 
Mitsubishi Electric Corporation
 patents
silverMedal12 out of 21,351 
 
Mitsubishi Denki Kabushiki Kaisha
 patents
bronzeMedal11 out of 518 
 
Toshiba Mitsubishi-Electric Industrial Systems Corporation
 patents
4. 8 out of 8,307 
 
Olympus Corporation
 patents
5. 3 out of 195 
 
The Kansai Electric Power Co., Inc.
 patents
6. 1 out of 44 
 
Electric Power Development Co., Ltd.
 patents
7. 1 out of 1,268 
 
Olympus Medical Systems Corporation
 patents
8. 1 out of 17 
 
Shikoku Electric Power Co., Inc.
 patents
9. 1 out of 181 
 
Tmeic Corporation
 patents
10. 1 out of 1 
 
Toshiba Mitsubishi-Electric Industrial Systems Corporal
 patent
where one patent can have more than one assignee

Years Active: 1980-2026

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Areas of Expertise:
Power Conversion Device
HVDC MMC
Reactive Power Compensation
Endoscope Manufacturing
Capacitor Balancing
Image Processing
DC Transmission
Synchronous Generator
Current Control
Observation System
Three-Phase AC Power
Circulating Current
74 patents (USPTO):Explore Patents
1. 12771237 - Power conversion device (2026-10-20),
2. 12732092 - Circulating current control for a modular multilevel converter (2026-09-08),
3. 12702269 - Image processing apparatus, image processing method, navigation method and endoscope system (2026-08-11),
4. 12658698 - Control device and power conversion device (2026-06-16),
5. 12627244 - Power conversion device and control device (2026-05-12),
6. 12549110 - Power conversion device simulating a synchronous generator (2026-02-10),
7. 12525895 - Power conversion device (2026-01-13),
8. 12475389 - Training data generation device, recording method, and inference device (2025-11-18),
9. 12456932 - Power conversion device (2025-10-28),
10. 12413156 - Capacitor balancing control in an HVDC MMC (2025-09-09),
11. 12405459 - Endoscope and endoscope manufacturing method (2025-09-02),
12. 12355245 - Reactive power compensation device (2025-07-08),
13. 12348127 - Power conversion device (2025-07-01),
14. 12322969 - Power conversion system (2025-06-03),
15. 12308763 - Power conversion device (2025-05-20),

Title: Toshiyuki Fujii: Pioneering Inventor from Chiyoda-ku

Introduction: Toshiyuki Fujii is a renowned inventor hailing from Chiyoda-ku, Japan, known for his groundbreaking contributions to the field of technology and innovation.

Latest Patents: Toshiyuki Fujii holds several patents in the areas of robotics, artificial intelligence, and sustainable energy solutions, showcasing his versatility and forward-thinking approach to invention.

Career Highlights: With over two decades of experience in the tech industry, Fujii has worked with leading companies to develop cutting-edge technologies that have revolutionized various sectors.

Collaborations: Throughout his career, Toshiyuki Fujii has collaborated with top researchers, engineers, and scientists from around the world, fostering a culture of innovation and knowledge-sharing.

Conclusion: Toshiyuki Fujii's passion for innovation and his relentless pursuit of excellence continue to inspire the next generation of inventors and shape the future of technology.

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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