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Sanken Electric Co., Ltd.

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USPTO Granted Patents = 644

% Expired Patents = 41.3

EPO Patents = 24

Trademarks = 4

Forward Citations = 5,049

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307 inventors (with patents filed for the assignee):

Akio Iwabuchi (35 out of 35 patents)

Ken Sato (34 out of 37 patents)

Hiroshi Usui (32 out of 34 patents)

4. Masaru Nakamura (26 out of 27 patents)

5. Masaaki Shimada (26 out of 26 patents)

6. Kengo Kimura (26 out of 26 patents)

7. Yoichi Kyono (24 out of 24 patents)

8. Osamu Ohtake (23 out of 24 patents)

9. Mamoru Tsuruya (23 out of 28 patents)

10. Hirokazu Goto (21 out of 24 patents)

11. Koji Ohtsuka (21 out of 21 patents)

12. Hiroshi Shikauchi (19 out of 22 patents)

13. Shinji Aso (19 out of 23 patents)

14. Mitsutomo Yoshinaga (17 out of 17 patents)

15. Koichi Morita (17 out of 17 patents)

Core Competencies:

Semiconductor Device

Power Conversion

Analog-to-Digital Converter

Integrated Circuit

Synchronous Rectification

High-Voltage MOSFET

DCDC Converter

Power Factor Correction

Trench Structures

Watchdog Timer

Excitation Current Detection

Light Emitting Device

644 patents: Sort by Forward Citations

1. 12433012 - Semiconductor device (2025-09-30),

2. 12431812 - Active clamp flyback converter having clamp switch and clamp capacitor and control IC for controlling the clamp switch to limit resonance current (2025-09-30),

3. 12372557 - Excitation current detection circuit and semiconductor device (2025-07-29),

4. 12362744 - Semiconductor device (2025-07-15),

5. 12328925 - Semiconductor device (2025-06-10),

6. 12308732 - DCDC converter, integrated circuit, and target voltage generation circuit (2025-05-20),

7. 12126267 - Resonant converter with a synchronous rectifier controller having ontime and offtime counting (2024-10-22),

8. 12119742 - Integrated circuit and method of digitally controling critical mode power factor correction circuit (2024-10-15),

9. 12113436 - Integrated circuit and method of synchronous rectification control of bridgeless power factor correction circuit (2024-10-08),

10. 12093118 - Watchdog timer device (2024-09-17),

11. 12039291 - Abnormality detection circuit and method of detecting an abnormality (2024-07-16),

12. 12003180 - Power supply for driving synchronous rectification elements of SEPIC converter (2024-06-04),

13. 11973431 - Switching power supply apparatus (2024-04-30),

14. 11967643 - Semiconductor device (2024-04-23),

15. 11949325 - Power conversion device (2024-04-02),

Company Overview

Sanken Electric Co., Ltd., headquartered in Niiza, Japan, specializes in the development and manufacturing of semiconductor devices. The company focuses on advanced technologies in power conversion, including high-voltage MOSFETs, DC-DC converters, and power factor correction solutions. Sanken's expertise extends to analog-to-digital converters and integrated circuits, catering to various industries that require efficient and reliable power management solutions. Their innovations play a crucial role in enhancing the performance of electronic systems globally.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Nov 3 2026

644 Patents

#1 in Niiza

#314 in Japan

#1,543 in the World

Sanken Electric Co., Ltd.

Forward Citations = 5,049

307 inventors:

Akio Iwabuchi (35 out of 35 patents)

Ken Sato (34 out of 37 patents)

Hiroshi Usui (32 out of 34 patents)

4. Masaru Nakamura (26 out of 27 patents)

5. Masaaki Shimada (26 out of 26 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Sanken Electric Co., Ltd.. Retrieved from https://idiyas.com/company/sanken-electric-company

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

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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