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Teijin Limited

USPTO Granted Patents = 1,605

% Expired Patents = 12.8

CIPO Patents = 70

EPO Patents = 330

Trademarks = 7

Forward Citations = 18,219

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1,771 inventors (with patents filed for the assignee):

Satoshi Nishikawa (48 out of 63 patents)

Yataro Ichikawa (46 out of 46 patents)

Shunichi Matsumura (42 out of 44 patents)

4. Hiroo Inata (41 out of 43 patents)

5. Seizi Kurozumi (34 out of 35 patents)

6. Yoshiki Suzuki (33 out of 37 patents)

7. Katsushi Sasaki (32 out of 34 patents)

8. Keizo Shimada (28 out of 29 patents)

9. Hiroaki Kaneko (26 out of 41 patents)

10. Takashi Yoshitomi (26 out of 26 patents)

11. Toru Sawaki (26 out of 29 patents)

12. Yuji Makino (26 out of 28 patents)

13. Toshio Tanaka (25 out of 44 patents)

14. Kinji Hasegawa (24 out of 24 patents)

15. Wataru Funakoshi (23 out of 23 patents)

Core Competencies:

Carbon Fiber Bundle

Non-Aqueous Battery

Composite Material

Prepreg

Resin Composition

Vehicle Structure

Medical Material

Optical Member

Thermoplastic Resin

Warp-Knitted Fabric

Separator

Conductive Film

1,605 patents: Sort by Forward Citations

1. 12747328 - Thermoplastic resin prepreg and method for manufacturing same (2026-09-29),

2. 12735814 - Pitch-based ultrafine carbon fibers and pitch-based ultrafine carbon fiber dispersion (2026-09-15),

3. 12728569 - Method for producing coated fiber-reinforced plastic (2026-09-08),

4. 12722468 - Battery structure for an electric vehicle (2026-09-01),

5. 12683246 - Separator for non-aqueous secondary battery and non-aqueous secondary battery (2026-07-14),

6. 12674022 - Method for producing aliphatic polyester, aliphatic polyester resin, and aliphatic polyester resin composition (2026-07-07),

7. 12668696 - Thermoplastic resin and optical member including same (2026-06-30),

8. 12658530 - Separator for non-aqueous secondary battery and non-aqueous secondary battery (2026-06-16),

9. 12649305 - Polymer member/inorganic base composite, production method therefor, and polymer member therefor (2026-06-09),

10. 12646803 - Separator for non-aqueous secondary battery and non-aqueous secondary battery (2026-06-02),

11. 12643267 - Method for producing composite material (2026-06-02),

12. 12633621 - Separator for non-aqueous secondary battery and non-aqueous secondary battery (2026-05-19),

13. 12609414 - Non-aqueous secondary battery (2026-04-21),

14. 12573652 - Substrate for composite membrane (2026-03-10),

15. 12548841 - Vehicle structure (2026-02-10),

Company Overview

Teijin Limited, headquartered in Osaka, Japan, is a leading company specializing in advanced materials and technologies, particularly in carbon fiber technology. The organization develops and manufactures a range of innovative products, including carbon fiber bundles, composite materials, and prepregs, which are essential for various applications in automotive, aerospace, and medical sectors. Teijin is also engaged in the development of non-aqueous batteries and resin compositions, contributing to advancements in vehicle structures and optical components.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

1,605 Patents

#17 in Osaka

#146 in Japan

#624 in the World

Teijin Limited

Forward Citations = 18,219

1,771 inventors:

Satoshi Nishikawa (48 out of 63 patents)

Yataro Ichikawa (46 out of 46 patents)

Shunichi Matsumura (42 out of 44 patents)

4. Hiroo Inata (41 out of 43 patents)

5. Seizi Kurozumi (34 out of 35 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Teijin Limited. Retrieved from https://idiyas.com/company/teijin

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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