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Tosoh Corporation

USPTO Granted Patents = 922

% Expired Patents = 11.2

CIPO Patents = 4

EPO Patents = 272

Trademarks = 51

Forward Citations = 6,750

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1,130 inventors (with patents filed for the assignee):

Hiroshi Inoue (28 out of 53 patents)

Takahiko Ishiguro (24 out of 25 patents)

Hideto Kuramochi (23 out of 24 patents)

4. Koji Tsukuma (23 out of 30 patents)

5. Toru Doi (22 out of 22 patents)

6. Yutaka Tamano (22 out of 24 patents)

7. Toshikazu Kato (22 out of 25 patents)

8. Noriaki Oshima (20 out of 20 patents)

9. Akihiro Yano (20 out of 20 patents)

10. Masami Mesuda (19 out of 19 patents)

11. Hidechika Hayashi (19 out of 21 patents)

12. Hiroyuki Fujisaki (18 out of 18 patents)

13. Kazuhiko Sekizawa (17 out of 21 patents)

14. Isao Yamashita (16 out of 16 patents)

15. Masao Nakano (16 out of 30 patents)

Core Competencies:

Fluororesin

Gallium Nitride

Zirconia Sintered Body

Zeolite

Sputtering Target

Polyurethane Resin

Electrolytic Manganese Dioxide

Hydrocarbon Adsorbent

Tumor Marker

Organic Semiconductor

Chromatography Column

Light Scattering Detectors

922 patents: Sort by Forward Citations

1. 12759948 - Ceramic matrix composite and method for producing the same (2026-10-13),

2. 12753235 - FC-BINDING PROTEIN HAVING IMPROVED ACID STABILITY, PRODUCTION METHOD FOR SAID PROTEIN, AND ANTIBODY-ADSORBING AGENT USING SAID PROTEIN (2026-10-06),

3. 12746528 - Deodorant composition and deodorant article (2026-09-29),

4. 12741275 - Cha-type zeolite and method for producing the same (2026-09-22),

5. 12738500 - Binder for positive electrode of lithium ion battery, slurry for forming positive electrode mixture layer of lithium ion battery, positive electrode for lithium ion battery, and lithium ion battery (2026-09-15),

6. 12735565 - Optical film and polarizing plate (2026-09-15),

7. 12734577 - Metal-Si based powder, method for producing same, metal-Si based sintered body, sputtering target, and metal-Si based thin film manufacturing method (2026-09-15),

8. 12679821 - Cyclic azine compound, material for organic light emitting diode, electron transport material for organic light emitting diode, and organic light emitting diode (2026-07-14),

9. 12673901 - Ceramic continuous fibers having metal element and ceramic matrix composite material using same (2026-07-07),

10. 12669512 - Protein diagnostic biomarker for severe cutaneous drug adverse reactions (2026-06-30),

11. 12662430 - Cr—Si—C-based sintered body (2026-06-23),

12. 12661632 - Hydrocarbon adsorbent and method for adsorbing hydrocarbons (2026-06-23),

13. 12649145 - Composition for carbon dioxide separation and method for separating carbon dioxide (2026-06-09),

14. 12631642 - RENAL CANCER DETECTION METHOD AND TEST DRUG (2026-05-19),

15. 12630795 - Cell culture substrate, method for producing cell culture substrate, and method for producing spheroids (2026-05-19),

Company Overview

Tosoh Corporation, headquartered in Shunan, Japan, specializes in the production of advanced materials, particularly fluororesins. The company is recognized for its expertise in various core technologies, including gallium nitride, zirconia sintered bodies, and zeolites. Tosoh also develops sputtering targets and polyurethane resins, contributing to diverse applications across industries. With a strong focus on innovation, Tosoh plays a significant role in enhancing materials for electronics, environmental solutions, and other high-tech sectors.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

922 Patents

#1 in Shunan

#239 in Japan

#1,102 in the World

Tosoh Corporation

Forward Citations = 6,750

1,130 inventors:

Hiroshi Inoue (28 out of 53 patents)

Takahiko Ishiguro (24 out of 25 patents)

Hideto Kuramochi (23 out of 24 patents)

4. Koji Tsukuma (23 out of 30 patents)

5. Toru Doi (22 out of 22 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Tosoh Corporation. Retrieved from https://idiyas.com/company/tosoh

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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