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Sumida Corporation

USPTO Granted Patents = 236

% Expired Patents = 19.9

EPO Patents = 128

Trademarks = 4

Forward Citations = 786

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129 inventors (with patents filed for the assignee):

Mitsugu Kawarai (26 out of 28 patents)

Hiroyuki Miyazaki (21 out of 63 patents)

Yoshiharu Yoshii (20 out of 22 patents)

4. Satoru Yamada (19 out of 111 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. Norikazu Mizuochi (13 out of 18 patents)

10. Kan Sano (12 out of 13 patents)

11. Tadayuki Fushimi (12 out of 13 patents)

12. Kei Tanaka (11 out of 11 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:

Coil Component

Magnetic Field Measurement

Electronic Component

High-Frequency Device

Power Supply System

Transformer

Inductor

Measurement Device

Biostimulation

Manufacturing Method

Current Sensor

Antenna Device

236 patents: Sort by Forward Citations

1. 12695394 - Output stabilizing circuit and DC/DC converter circuit (2026-07-28),

2. 12656385 - Transformer turns number testing circuit (2026-06-16),

3. 12625206 - Digitizing device and digitizing method (2026-05-12),

4. 12625205 - Nuclear magnetic resonance sensing device and nuclear magnetic resonance sensing method (2026-05-12),

5. 12586715 - Coil component (2026-03-24),

6. 12584873 - Measurement device and measurement method (2026-03-24),

7. 12533510 - Electrical stimulator (2026-01-27),

8. 12500025 - Coil component (2025-12-16),

9. 12379428 - Magnetic field measurement apparatus and magnetic field measurement method (2025-08-05),

10. 12260984 - Coil component (2025-03-25),

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

12. 12233581 - Manufacturing method of coil component and coil component (2025-02-25),

13. 12230435 - Coil component (2025-02-18),

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

15. 12142409 - Coil component (2024-11-12),

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 - Sep 15 2026

Sumida Corporation

236 Patents

#315 in

#630 in

#3,633 in the World

Sumida Corporation

Forward Citations = 786

129 inventors:

Mitsugu Kawarai (26 out of 28 patents)

Hiroyuki Miyazaki (21 out of 63 patents)

Yoshiharu Yoshii (20 out of 22 patents)

4. Satoru Yamada (19 out of 111 patents)

5. Shinichi Sakamoto (16 out of 23 patents)

Please report any incorrect information to [email protected]

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