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Sumida Corporation

USPTO Granted Patents = 228

EPO Patents = 122

Trademarks = 5

Forward Citations = 750

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156 inventors (with patents filed for the assignee):

Mitsugu Kawarai (26 out of 28 patents)

Satoru Yamada (19 out of 111 patents)

Hiroyuki Miyazaki (19 out of 60 patents)

4. Yoshiharu Yoshii (16 out of 17 patents)

5. Shinichi Sakamoto (16 out of 23 patents)

6. Hitoshi Moriya (15 out of 17 patents)

7. Juichi Oki (14 out of 14 patents)

8. Takanobu Rokuka (14 out of 14 patents)

9. Kan Sano (12 out of 13 patents)

10. Tadayuki Fushimi (12 out of 13 patents)

11. Kei Tanaka (11 out of 11 patents)

12. Norikazu Mizuochi (10 out of 13 patents)

13. Masaki Saito (9 out of 49 patents)

14. Yoshinori Miura (9 out of 9 patents)

15. Yoshiyuki Hatayama (9 out of 9 patents)

Core Competencies:

Magnetic Field Measurement

Coil Component

High-Frequency Magnetic Field

Transformer Manufacturing

Electronic Component Evaluation

Power Transmission Device

Inductor Technology

Excitation Light Irradiation

Magnetic Coupling Reactor

Current Detection Device

Power Supply Systems

Biostimulation Apparatus

228 patents: Sort by Forward Citations

1. 12379428 - Magnetic field measurement apparatus and magnetic field measurement method (2025-08-05),

2. 12260984 - Coil component (2025-03-25),

3. 12248049 - High-frequency magnetic field generating device (2025-03-11),

4. 12233581 - Manufacturing method of coil component and coil component (2025-02-25),

5. 12230435 - Coil component (2025-02-18),

6. 12198849 - Method for manufacturing a transformer (2025-01-14),

7. 12142409 - Coil component (2024-11-12),

8. 12066392 - Excitation light irradiating apparatus and excitation light irradiating method (2024-08-20),

9. 11988729 - Measuring device and measuring method (2024-05-21),

10. 11978582 - Coil component (2024-05-07),

11. 11933865 - Magnetic field measurement apparatus and magnetic field measurement method (2024-03-19),

12. 11887771 - Electronic component and method for manufacturing electronic component (2024-01-30),

13. 11887290 - Electronic component evaluation method, electronic component evaluation device, and electronic component evaluation program (2024-01-30),

14. 11863042 - Power transmission device (2024-01-02),

15. 11855546 - Output stabilization circuit and DC/DC converter circuit (2023-12-26),

SUMIDA CORPORATION is a global supplier of inductive components, modules, and solutions. With expertise in electromagnetism, our products are widely used in automotive, consumer electronics, industrial, and medical applications. We offer a diverse range of solutions including power inductors, RF inductors, transformers, choke coils, and modules for wireless charging, power management, and noise suppression. Our commitment to quality and innovation enables us to deliver reliable, efficient, and cutting-edge solutions for our customers worldwide.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

228 Patents

#275 in

#621 in

#3,632 in the World

Sumida Corporation

Forward Citations = 750

156 inventors:

Mitsugu Kawarai (26 out of 28 patents)

Satoru Yamada (19 out of 111 patents)

Hiroyuki Miyazaki (19 out of 60 patents)

4. Yoshiharu Yoshii (16 out of 17 patents)

5. Shinichi Sakamoto (16 out of 23 patents)

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