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Sumida Corporation

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USPTO Granted Patents = 239

% Expired Patents = 19.7

EPO Patents = 128

Trademarks = 4

Forward Citations = 805

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129 inventors (with patents filed for the assignee):

Mitsugu Kawarai (27 out of 29 patents)

Hiroyuki Miyazaki (22 out of 64 patents)

Yoshiharu Yoshii (20 out of 22 patents)

4. Satoru Yamada (19 out of 111 patents)

5. Shinichi Sakamoto (18 out of 25 patents)

6. Juichi Oki (15 out of 15 patents)

7. Hitoshi Moriya (15 out of 17 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. Tomohiro Kajiyama (9 out of 9 patents)

14. Tsutomu Otsuka (9 out of 11 patents)

15. Douglas James Malcolm (9 out of 10 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

239 patents: Sort by Forward Citations

1. 12776446 - Method for manufacturing electronic component with coil (2026-10-27),

2. 12771264 - Inverter circuit and electric field coupling non-contact power feeding device (2026-10-20),

3. 12746712 - Manufacturing method of coil component and coil component (2026-09-29),

4. 12695394 - Output stabilizing circuit and DC/DC converter circuit (2026-07-28),

5. 12656385 - Transformer turns number testing circuit (2026-06-16),

6. 12625206 - Digitizing device and digitizing method (2026-05-12),

7. 12625205 - Nuclear magnetic resonance sensing device and nuclear magnetic resonance sensing method (2026-05-12),

8. 12586715 - Coil component (2026-03-24),

9. 12584873 - Measurement device and measurement method (2026-03-24),

10. 12533510 - Electrical stimulator (2026-01-27),

11. 12500025 - Coil component (2025-12-16),

12. 12379428 - Magnetic field measurement apparatus and magnetic field measurement method (2025-08-05),

13. 12260984 - Coil component (2025-03-25),

14. 12248049 - High-frequency magnetic field generating device (2025-03-11),

15. 12233581 - Manufacturing method of coil component and coil component (2025-02-25),

Company Overview

Sumida Corporation, headquartered in Tokyo, Japan, specializes in the development and manufacturing of coil components essential for various electronic applications. The company focuses on advanced technologies in magnetic field measurement, high-frequency devices, and power supply systems, catering to diverse sectors including automotive and consumer electronics. With a commitment to innovation, Sumida plays a pivotal role in enhancing the performance and efficiency of electronic devices through its expertise in transformers, inductors, and measurement devices.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 27 2026

239 Patents

#314 in

#628 in

#3,613 in the World

Sumida Corporation

Forward Citations = 805

129 inventors:

Mitsugu Kawarai (27 out of 29 patents)

Hiroyuki Miyazaki (22 out of 64 patents)

Yoshiharu Yoshii (20 out of 22 patents)

4. Satoru Yamada (19 out of 111 patents)

5. Shinichi Sakamoto (18 out of 25 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Sumida Corporation. Retrieved from https://idiyas.com/company/sumida

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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