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Toho Rayon Co., Ltd.

USPTO Granted Patents = 29

CIPO Patents = 1

Forward Citations = 438

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57 inventors (with patents filed for the assignee):

Yasuhisa Nagata (7 out of 8 patents)

Hiroyasu Ogawa (6 out of 16 patents)

Hayashi Takahashi (3 out of 5 patents)

4. Yoshihiro Endoh (3 out of 5 patents)

5. Katsumi Nakama (3 out of 4 patents)

6. Shuji Takahashi (2 out of 57 patents)

7. Yasuo Suzuki (2 out of 8 patents)

8. Masanobu Wakita (2 out of 4 patents)

9. Yoshio Iizuka (2 out of 4 patents)

10. Hiroyuki Kosuda (2 out of 5 patents)

11. Masato Andoh (2 out of 3 patents)

12. Hideaki Fukuizumi (2 out of 4 patents)

13. Tetsuro Shigei (2 out of 5 patents)

14. Yoshihiro Endo (2 out of 2 patents)

15. Teruaki Muramatsu (2 out of 2 patents)

Core Competencies:

Molding Material

Carbon Fiber

Resin Composition

Polyimide Composite

Graphite Fiber

Thermoplastic Resin

Friction Material

Prepregs

Surface Treatment

Conductive Polymer Film

Cylindrical Products

Acrylic Fiber

29 patents: Sort by Forward Citations

1. 6139956 - Molding material and method for producing the same (2000-10-31),

2. 6054177 - Molding material and process for the production thereof (2000-04-25),

3. 5899118 - Steering wheel and method of manufacture (1999-05-04),

4. 5840347 - Apparatus for making a cylindrical product of fiber (1998-11-24),

5. 5685525 - Carbon fiber reinforced resin coil spring (1997-11-11),

6. 5585062 - Process for making a cylindrical product of fiber (1996-12-17),

7. 5514771 - Process for preparation of soluble ion-doped poly (alkyl-substituted (1996-05-07),

8. 5443859 - Carbon film and process for preparing the same (1995-08-22),

9. 5438105 - Polyamic acid composite, polyimide composite and processes for producing (1995-08-01),

10. 5371152 - Resin composition and process for producing the composition (1994-12-06),

11. 5352524 - Carbon film and process for preparing the same (1994-10-04),

12. 5286563 - Acrylic fiber strand suitable for use in carbon fiber production and (1994-02-15),

13. 5284702 - Low fuming phenolic resin prepreg and process for producing the same (1994-02-08),

14. 5231162 - Polyamic acid having three-dimensional network molecular structure, (1993-07-27),

15. 5227238 - Carbon fiber chopped strands and method of production thereof (1993-07-13),

Company Overview

Toho Rayon Co., Ltd. is a prominent Japanese company specializing in the development and manufacturing of synthetic fibers and advanced materials. With a strong focus on innovation, the company engages in various sectors, including textiles, automotive components, and industrial materials. Toho Rayon is committed to sustainability and the advancement of technology, contributing to eco-friendly solutions and high-performance products that cater to diverse market needs. Its research initiatives emphasize enhancing material properties and applications across multiple industries.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

29 Patents

#1,089 in Tokyo

#2,362 in Japan

#22,570 in the World

Toho Rayon Co., Ltd.

Forward Citations = 438

57 inventors:

Yasuhisa Nagata (7 out of 8 patents)

Hiroyasu Ogawa (6 out of 16 patents)

Hayashi Takahashi (3 out of 5 patents)

4. Yoshihiro Endoh (3 out of 5 patents)

5. Katsumi Nakama (3 out of 4 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Toho Rayon Co., Ltd.. Retrieved from https://idiyas.com/company/toho-rayon-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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