% Expired Patents = 60.0

EPO Patents = 4

Trademarks = 1

Forward Citations = 13

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13 inventors (with patents filed for the assignee):

Hirohisa Masuda (2 out of 6 patents)

Hiroshi Shimomura (1 out of 24 patents)

Koji Yamada (1 out of 32 patents)

4. Akira Ishiko (1 out of 4 patents)

5. Kenji Hayashi (1 out of 159 patents)

6. Yukiko Saito (1 out of 4 patents)

7. Tatsuo Matoda (1 out of 2 patents)

8. Shigeru Suzuki (1 out of 7 patents)

9. Taketo Shinchi (1 out of 1 patent)

10. Naoko Harada (1 out of 1 patent)

11. Shuzo Mihara (1 out of 1 patent)

12. Seiichi Kadooka (1 out of 1 patent)

13. Hisashi Kamatani (1 out of 1 patent)

14. Nishiyama Shigeyoshi (0 patent)

15. Shimomura Hiroshi (0 patent)

5 patents: Sort by Forward Citations

1. 9815995 - Ink for ink-jet printing, printed cylindrical containers and method for producing the same (2017-11-14),

2. 9637651 - Bismuth oxide-based addictive for laser marking (2017-05-02),

3. 9115262 - Complex inorganic colored pigment with reduced elution of hexavalent chromium therefrom (2015-08-25),

4. 7148165 - Lead-free low softening point glass (2006-12-12),

5. 6989340 - Lead-free low softening point glass (2006-01-24),

Company Overview

Tokan Material Technology Co., Ltd. is a leading manufacturer of advanced materials for various industries. With a focus on research and development, we provide high-quality materials that meet the needs of our customers. Our innovative solutions have been widely used in automotive, aerospace, electronics, and other sectors. Through continuous innovation, we strive to create value for our customers and contribute to a sustainable future.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

5 Patents

#717 in Osaka

#6,654 in Japan

Osaka, Japan

Tokan Material Technology Co., Ltd.

Forward Citations = 13

13 inventors:

Hirohisa Masuda (2 out of 6 patents)

Hiroshi Shimomura (1 out of 24 patents)

Koji Yamada (1 out of 32 patents)

4. Akira Ishiko (1 out of 4 patents)

5. Kenji Hayashi (1 out of 159 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Tokan Material Technology Co., Ltd.. Retrieved from https://idiyas.com/company/tokan-material-technology-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]

4 patents (EPO):

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]