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Toyo Kohan Co., Ltd.

Calculating rank

USPTO Granted Patents = 260

% Expired Patents = 20.0

CIPO Patents = 1

EPO Patents = 72

Forward Citations = 984

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301 inventors (with patents filed for the assignee):

Koh Yoshioka (27 out of 27 patents)

Tsuneo Inui (25 out of 26 patents)

Tatsuo Tomomori (24 out of 24 patents)

4. Yoshikazu Kondo (23 out of 23 patents)

5. Kinji Saijo (20 out of 26 patents)

6. Hitoshi Ohmura (19 out of 19 patents)

7. Atsuo Tanaka (18 out of 19 patents)

8. Hironao Okayama (17 out of 19 patents)

9. Kazuo Yoshida (17 out of 24 patents)

10. Kota Sadaki (15 out of 15 patents)

11. Teppei Kurokawa (14 out of 14 patents)

12. Nobuaki Mukai (14 out of 15 patents)

13. Shinichirou Horie (13 out of 13 patents)

14. Hideo Ohmura (12 out of 12 patents)

15. Michifumi Tanga (12 out of 12 patents)

Core Competencies:

Surface-Treated Steel

Battery Containers

Electrolytic Foil

Current Collector

Resin Coated Metal

Roughened Nickel-Plated

Roll-Bonded Laminate

Superconducting Wire

Thermoplastic Resin Film

Alloy Plate Coated

Multilayered Polyester

Hybridization Method

260 patents: Sort by Forward Citations

1. 12508778 - Layered composite (2025-12-30),

2. 12476256 - Electrolytic foil and battery current collector (2025-11-18),

3. 12448697 - Surface-treated steel sheet and production method therefor (2025-10-21),

4. 12402253 - Copper clad laminate and method for producing the same (2025-08-26),

5. 12377636 - Resin film for laminating metal plate and laminated metal plate using the same (2025-08-05),

6. 12325928 - Roughened nickel-plated sheet (2025-06-10),

7. 12322809 - Current collector for battery, and battery (2025-06-03),

8. 12270109 - Surface-treated steel sheet and method for manufacturing the same (2025-04-08),

9. 12199294 - Surface-treated steel sheet for cell container (2025-01-14),

10. 12199293 - Surface-treated steel sheet for cell container (2025-01-14),

11. 12163243 - Surface-treated steel sheet, metal container, and method for manufacturing surface-treated steel sheet (2024-12-10),

12. 12122122 - Resin-coated metallic plate, and metallic can produced by processing said resin- coated metallic plate (2024-10-22),

13. 12104271 - Roughened plated sheet (2024-10-01),

14. 12070923 - Substrate for epitaxial growth and method for producing same (2024-08-27),

15. 12049060 - Multilayered polyester resin-coated metal sheet, multilayered polyester resin film, and can lid (2024-07-30),

Company Overview

Toyo Kohan Co., Ltd., based in Tokyo, specializes in the development and manufacturing of surface-treated steel products. The company is recognized for its innovative solutions in various applications, including battery containers and electrolytic foil, which are essential in the electronics and automotive sectors. Additionally, Toyo Kohan focuses on advanced technologies such as resin-coated metal and superconducting wire, contributing to the evolution of materials science and engineering. Its commitment to quality and innovation positions it as a key player in the steel industry.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 27 2026

260 Patents

#301 in Tokyo

#591 in Japan

#3,373 in the World

Toyo Kohan Co., Ltd.

Forward Citations = 984

301 inventors:

Koh Yoshioka (27 out of 27 patents)

Tsuneo Inui (25 out of 26 patents)

Tatsuo Tomomori (24 out of 24 patents)

4. Yoshikazu Kondo (23 out of 23 patents)

5. Kinji Saijo (20 out of 26 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Toyo Kohan Co., Ltd.. Retrieved from https://idiyas.com/company/toyo-kohan-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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