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Fukushima, Japan

Nitto Boseki Co., Ltd.

Calculating rank

USPTO Granted Patents = 266

% Expired Patents = 3.0

EPO Patents = 71

Trademarks = 14

Forward Citations = 1,985

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362 inventors (with patents filed for the assignee):

Takeshi Nagasawa (38 out of 38 patents)

Katsumasa Kuroiwa (28 out of 28 patents)

Katsuhiro Katayama (23 out of 23 patents)

4. Hiroaki Shono (18 out of 18 patents)

5. Ryo Kojima (17 out of 17 patents)

6. Susumu Harada (17 out of 18 patents)

7. Shin Kasai (14 out of 14 patents)

8. Toshihide Miura (13 out of 13 patents)

9. Yosuke Nukui (12 out of 16 patents)

10. Kiyoshi Shimizu (11 out of 13 patents)

11. Takashi Nonaka (10 out of 14 patents)

12. Yutaka Kawaguchi (10 out of 10 patents)

13. Yoshiro Sato (9 out of 9 patents)

14. Hirokazu Inoguchi (9 out of 10 patents)

15. Yoshio Nakamura (9 out of 9 patents)

Core Competencies:

Glass Composition

Glass Fiber

Reinforced Resin

Prepreg

Glass Cloth

Long Glass Fiber

Composite Material

Chopped Strand Mat

Thermoplastic Resin

Heat-Resistant Material

Fiber-Reinforced

Glass Manufacturing

266 patents: Sort by Forward Citations

1. 12459856 - Glass composition for glass fiber, glass fiber, glass fiber woven fabric, and glass fiber reinforced resin composition (2025-11-04),

2. 12428757 - Glass cloth, prepreg, and printed wiring board (2025-09-30),

3. 12421374 - Metal-glass fiber-reinforced thermoplastic resin composite material (2025-09-23),

4. 12421162 - Glass composition for glass fibers, glass fiber, glass fiber woven fabric, and glass-fiber-reinforced resin composition (2025-09-23),

5. 12351506 - Glass composition for glass fibers, glass fibers, glass fiber textile, and glass fiber-reinforced resin composition (2025-07-08),

6. 12286731 - Glass cloth, prepreg, and printed wiring board (2025-04-29),

7. 12275665 - Glass composition for glass fibers, glass fibers, woven glass fiber fabric, and glass-fiber-reinforced resin composition (2025-04-14),

8. 12195600 - Flat-cross-section glass fiber, glass-fiber-reinforced resin composition, and glass-fiber-reinforced resin molded product (2025-01-14),

9. 12153054 - Method for isolating cell nuclei having enhanced antigenicity from fixed cells or FFPE tissue section, and antigen activator and kit therefor (2024-11-26),

10. 12139591 - Glass fiber-reinforced resin molded article (2024-11-12),

11. 12110249 - Long glass fiber manufacturing method, and long glass fiber (2024-10-08),

12. 12104294 - Composite yarn fabric and method for producing fiber-reinforced resin molded article using same (2024-10-01),

13. 12098254 - Glass fiber-reinforced resin molded article (2024-09-24),

14. 12041727 - Surface-treated glass cloth, prepreg, and printed wiring board (2024-07-16),

15. 11959203 - Glass roving cloth and glass-fiber-reinforced resin sheet (2024-04-16),

Company Overview

Nitto Boseki Co., Ltd., headquartered in Fukushima, Japan, specializes in advanced glass fiber technology. The company focuses on the development and manufacturing of various glass compositions and products, including glass fibers, reinforced resins, and prepregs. Nitto Boseki is recognized for its expertise in composite materials, such as glass cloth and chopped strand mats, catering to diverse industries that require high-performance materials. Their innovations contribute significantly to enhancing the durability and functionality of composite applications.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 27 2026

266 Patents

#1 in Fukushima

#576 in Japan

#3,306 in the World

Fukushima, Japan

Nitto Boseki Co., Ltd.

Forward Citations = 1,985

362 inventors:

Takeshi Nagasawa (38 out of 38 patents)

Katsumasa Kuroiwa (28 out of 28 patents)

Katsuhiro Katayama (23 out of 23 patents)

4. Hiroaki Shono (18 out of 18 patents)

5. Ryo Kojima (17 out of 17 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Nitto Boseki Co., Ltd.. Retrieved from https://idiyas.com/company/nitto-boseki-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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