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For the Inventor, By the Inventor

Shunan, Japan

Tosoh Corporation


USPTO Granted Patents = 919

% Expired Patents = 11.2



Trademarks = 51

Forward Citations = 6,750

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1,121 inventors (with patents filed for the assignee):

goldMedal Hiroshi Inoue (28 out of 53 patents)

silverMedal Takahiko Ishiguro (24 out of 25 patents)

bronzeMedal 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.  Masao Nakano (16 out of 30 patents)

15.  Shigeru Hirano (15 out of 49 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

919 patents:

1. 12741275 - Cha-type zeolite and method for producing the same (2026-09-22),
2. 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),
3. 12735565 - Optical film and polarizing plate (2026-09-15),
4. 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),
5. 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),
6. 12673901 - Ceramic continuous fibers having metal element and ceramic matrix composite material using same (2026-07-07),
7. 12669512 - Protein diagnostic biomarker for severe cutaneous drug adverse reactions (2026-06-30),
8. 12662430 - Cr—Si—C-based sintered body (2026-06-23),
9. 12661632 - Hydrocarbon adsorbent and method for adsorbing hydrocarbons (2026-06-23),
10. 12649145 - Composition for carbon dioxide separation and method for separating carbon dioxide (2026-06-09),
11. 12631642 - RENAL CANCER DETECTION METHOD AND TEST DRUG (2026-05-19),
12. 12630795 - Cell culture substrate, method for producing cell culture substrate, and method for producing spheroids (2026-05-19),
13. 12625148 - Method for collecting extracellular vesicles derived from nervous system cells (2026-05-12),
14. 12624142 - Optical polymer material, optical film, display device, optical polymer material manufacturing method, and optical film manufacturing method (2026-05-12),
15. 12623999 - Carbamate production method, carbamate ester production method, and urea derivative production method (2026-05-12),
Tosoh Corporation is a Japanese multinational chemical company. It specializes in the production and distribution of various chemical products, including petrochemicals, specialty polymers, and fine chemicals. With a strong focus on innovation and technology, Tosoh Corporation strives to provide high-quality solutions for industries such as automotive, electronics, and pharmaceuticals. Their commitment to sustainability and corporate social responsibility is evident in their efforts to develop environmentally friendly products and reduce their carbon footprint.
This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Sep 22 2026

Tosoh Corporation
919 Patents

#1 in Shunan

#239 in Japan

#1,101 in the World

Shunan, JP
Shunan, Japan

Tosoh Corporation

Forward Citations = 6,750

1,121 inventors:

goldMedal Hiroshi Inoue (28 out of 53 patents)

silverMedal Takahiko Ishiguro (24 out of 25 patents)

bronzeMedal Hideto Kuramochi (23 out of 24 patents)

4.  Koji Tsukuma (23 out of 30 patents)

5.  Toru Doi (22 out of 22 patents)

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