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For the Inventor, By the Inventor

Yamatokoriyama, Japan

Toho Kasei Co., Ltd.

Calculating rank
USPTO Granted Patents = 10

% Expired Patents = 20.0


Forward Citations = 65

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31 inventors (with patents filed for the assignee):

goldMedal Susumu Kawato (3 out of 3 patents)

silverMedal Satoshi Shimizu (3 out of 3 patents)

bronzeMedal Toru Sakai (2 out of 42 patents)

4.  Hirokazu Yamamoto (2 out of 2 patents)

5.  Hirotaka Itami (2 out of 2 patents)

6.  Takafumi Nakagawa (2 out of 2 patents)

7.  Katsunori Takada (2 out of 3 patents)

8.  Takashi Kanemura (2 out of 21 patents)

9.  Meiten Kou (2 out of 4 patents)

10.  Tetsuhiro Kodani (2 out of 20 patents)

11.  Eri Mukai (2 out of 18 patents)

12.  Yoshio Takemura (2 out of 2 patents)

13.  Susumu Matsuda (2 out of 2 patents)

14.  Shinya Morita (1 out of 72 patents)

15.  Satoru Murata (1 out of 13 patents)


10 patents:

1. 11925121 - Piezoelectric element having excellent flexibility and bend resistance (2024-03-05),
2. 10941224 - Composite resin material and molded body (2021-03-09),
3. 10920059 - Composite resin material and molded article (2021-02-16),
4. D862404 - Sealing material ring for a semiconductor manufacturing apparatus (2019-10-08),
5. 10388812 - Method of recycling solar cell module (2019-08-20),
6. 10084292 - Method and apparatus for producing a polarized resin film (2018-09-25),
7. 9865996 - Polarized resin film and process for producing same (2018-01-09),
8. 7107701 - Substrate drying method and apparatus (2006-09-19),
9. 6435570 - Resin pipe joint (2002-08-20),
10. 6219936 - Wafer drying device and method (2001-04-24),
Company Overview
Toho Kasei Co., Ltd. is a prominent manufacturer based in Yamatokoriyama, Japan, specializing in the development of advanced synthetic resins and plastics. The company focuses on providing innovative solutions for various industries, including automotive, electronics, and consumer goods. With a commitment to research and development, Toho Kasei aims to enhance material performance and sustainability, contributing to the evolution of modern manufacturing processes and product design. Its expertise in polymer technology positions it as a key player in the materials sector.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Nov 3 2026

10 Patents

#1 in Yamatokoriyama

#4,408 in Japan

#56,169 in the World

Yamatokoriyama, JP
Yamatokoriyama, Japan

Toho Kasei Co., Ltd.

Forward Citations = 65

31 inventors:

goldMedal Susumu Kawato (3 out of 3 patents)

silverMedal Satoshi Shimizu (3 out of 3 patents)

bronzeMedal Toru Sakai (2 out of 42 patents)

4.  Hirokazu Yamamoto (2 out of 2 patents)

5.  Hirotaka Itami (2 out of 2 patents)

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