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For the Inventor, By the Inventor

Hiroshima, Japan

Toda Kogyo Corporation

USPTO Granted Patents = 390

% Expired Patents = 21.3



Forward Citations = 1,977

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333 inventors (with patents filed for the assignee):

goldMedal Kazuyuki Hayashi (80 out of 82 patents)

silverMedal Hiroko Morii (73 out of 75 patents)

bronzeMedal Keisuke Iwasaki (44 out of 46 patents)

4.  Yasuyuki Tanaka (34 out of 34 patents)

5.  Nanao Horiishi (31 out of 33 patents)

6.  Yasuhiko Fujii (28 out of 30 patents)

7.  Hideaki Sadamura (27 out of 27 patents)

8.  Koso Aoki (26 out of 26 patents)

9.  Kenji Okinaka (23 out of 23 patents)

10.  Hiromitsu Misawa (23 out of 24 patents)

11.  Yoji Okano (20 out of 20 patents)

12.  Eiichi Kurita (20 out of 20 patents)

13.  Takanori Doi (18 out of 18 patents)

14.  Masayuki Uegami (18 out of 18 patents)

15.  Norimichi Nagai (18 out of 18 patents)


Core Competencies:
Non-Aqueous Electrolyte
Ferrite Particles
Rare Earth Magnets
Lithium Titanate
Positive Electrode
Magnetic Antenna
Electromagnetic Interference
Hydrotalcite Particles
Composite Particles
Carbon Nanotube
Magnetic Carrier
Sodium Ferrite

390 patents:

1. 12658586 - Ferrite sheet, and antenna apparatus and non-contact power supply apparatus using same (2026-06-16),
2. 12562297 - R-T-B-based rare earth magnet particles, process for producing the R-T-B-based rare earth magnet particles, and bonded magnet (2026-02-24),
3. 12505942 - Ferrite sheet strip, and antenna device and cable using ferrite sheet strip (2025-12-23),
4. 12502637 - Solid recovery material for carbon dioxide and method for producing same (2025-12-23),
5. 12421132 - Sodium ferrite particle powder and production method thereof (2025-09-23),
6. 12246475 - Ferrite particles for bonded magnets, resin composition for bonded magnets, and molded product using the same (2025-03-11),
7. 12183921 - Li—Ni composite oxide particles and non-aqueous electrolyte secondary battery (2024-12-31),
8. 11942701 - Module substrate antenna and module substrate using same (2024-03-26),
9. 11873230 - Hydrotalcite particles, method for producing hydrotalcite particles, resin stabilizer containing hydrotalcite particles, and resin composition containing hydrotalcite particles (2024-01-16),
10. 11823823 - Ferrite particles for bonded magnets, resin composition for bonded magnets, and molded product using the same (2023-11-21),
11. 11820055 - Ferrite particles for bonded magnets, resin composition for bonded magnets, and molded product using the same (2023-11-21),
12. 11688534 - Process for producing R-T-B-based rare earth magnet particles, R-T-B-based rare earth magnet particles, and bonded magnet (2023-06-27),
13. 11552292 - Lithium nickelate-based positive electrode active substance particles and process for producing the same, and non-aqueous electrolyte secondary battery (2023-01-10),
14. 11551851 - Module substrate antenna, and module substrate mounting the same (2023-01-10),
15. 11492266 - Processes for preparing positive electrode active substance for non-aqueous electrolyte secondary batteries (2022-11-08),
Company Overview
Toda Kogyo Corporation, headquartered in Hiroshima, Japan, specializes in the development and manufacturing of advanced non-aqueous electrolyte batteries. The company focuses on innovative technologies such as ferrite particles, rare earth magnets, and lithium titanate, which are integral to enhancing battery performance and efficiency. Additionally, Toda Kogyo is engaged in research related to positive electrodes, magnetic antennas, and solutions for electromagnetic interference, positioning itself as a key player in the energy storage and materials science sectors.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 20 2026

390 Patents

#3 in Hiroshima, 729-3431

#443 in Japan

#2,373 in the World

Hiroshima, JP
Hiroshima, Japan

Toda Kogyo Corporation

Forward Citations = 1,977

333 inventors:

goldMedal Kazuyuki Hayashi (80 out of 82 patents)

silverMedal Hiroko Morii (73 out of 75 patents)

bronzeMedal Keisuke Iwasaki (44 out of 46 patents)

4.  Yasuyuki Tanaka (34 out of 34 patents)

5.  Nanao Horiishi (31 out of 33 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Toda Kogyo Corporation. Retrieved from https://idiyas.com/company/toda-kogyo

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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