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For the Inventor, By the Inventor

Tokyo, Japan

Japan Elastomer Co., Ltd.


USPTO Granted Patents = 14

% Expired Patents = 7.1


Forward Citations = 73

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21 inventors (with patents filed for the assignee):

goldMedal Yukinori Nakamichi (5 out of 5 patents)

silverMedal Hideki Yamasaki (4 out of 5 patents)

bronzeMedal Takahiro Hisasue (3 out of 14 patents)

4.  Shigeo Nakajima (3 out of 18 patents)

5.  Masahiro Fujiwara (3 out of 3 patents)

6.  Atsushi Yasumoto (2 out of 7 patents)

7.  Yoshifumi Araki (2 out of 37 patents)

8.  Keiichi Toda (2 out of 2 patents)

9.  Kosuke Nakatani (1 out of 4 patents)

10.  Kenta Shibuya (1 out of 7 patents)

11.  Shouzou Akagi (1 out of 1 patent)

12.  Kenji Ebara (1 out of 7 patents)

13.  Kazuo Moritou (1 out of 4 patents)

14.  Hiroshi Fusamae (1 out of 1 patent)

15.  Takaaki Matsuda (1 out of 1 patent)


14 patents:

1. 11248064 - Conjugated diene polymer, conjugated diene polymer composition, and tire (2022-02-15),
2. 10822446 - Modified conjugated diene polymer, modified conjugated diene polymer composition, tire, and method for producing modified conjugated diene polymer (2020-11-03),
3. 10472514 - Block copolymer composition and adhesive composition (2019-11-12),
4. 10385243 - Block copolymer and adhesive composition (2019-08-20),
5. 10316111 - Conjugated diene-based polymer, method for producing the same, and composition including the same (2019-06-11),
6. 9359537 - Block copolymer composition for viscous adhesive, and adhesive composition (2016-06-07),
7. 8563646 - Adhesive composition (2013-10-22),
8. 8039553 - Pressure-sensitive adhesive composition (2011-10-18),
9. 7005469 - Modified rubber, process for producing the same, and composition (2006-02-28),
10. 6833411 - Block copolymer compositions (2004-12-21),
11. 6646036 - Block copolymer composition (2003-11-11),
12. 6306976 - Rubbery polymer and method for producing the same (2001-10-23),
13. 6150439 - Block copolymer composition for modifying asphalt and asphalt (2000-11-21),
14. 4482677 - Process for producing high impact polystyrene (1984-11-13),
Company Overview
Japan Elastomer Co., Ltd. is a prominent player in the development and manufacturing of advanced elastomer materials. The company specializes in producing high-performance rubber products that cater to various industries, including automotive, electronics, and healthcare. With a strong emphasis on innovation, Japan Elastomer focuses on enhancing material properties and performance through cutting-edge research and technology. Its commitment to quality and sustainability positions it as a key contributor in the elastomer sector within Japan and beyond.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 20 2026

14 Patents

#1,599 in Tokyo

#3,584 in Japan

#42,290 in the World

Tokyo, JP
Tokyo, Japan

Japan Elastomer Co., Ltd.

Forward Citations = 73

21 inventors:

goldMedal Yukinori Nakamichi (5 out of 5 patents)

silverMedal Hideki Yamasaki (4 out of 5 patents)

bronzeMedal Takahiro Hisasue (3 out of 14 patents)

4.  Shigeo Nakajima (3 out of 18 patents)

5.  Masahiro Fujiwara (3 out of 3 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Japan Elastomer Co., Ltd.. Retrieved from https://idiyas.com/company/japan-elastomer-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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