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For the Inventor, By the Inventor

Tokyo, Japan

Japan Composite Co., Ltd.

Calculating rank
USPTO Granted Patents = 8

% Expired Patents = 25.0

Forward Citations = 1

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11 inventors (with patents filed for the assignee):

goldMedal Masahiro Hakotani (6 out of 6 patents)

silverMedal Ikuo Akai (5 out of 5 patents)

bronzeMedal Takashi Tsukamoto (4 out of 34 patents)

4.  Hiroya Okumura (2 out of 6 patents)

5.  Takashi Shibata (1 out of 20 patents)

6.  Keizo Kimura (1 out of 1 patent)

7.  Shinji Tachibana (1 out of 1 patent)

8.  Takeshi Kusagaya (1 out of 1 patent)

9.  Satoshi Tamura (1 out of 1 patent)

10.  Kenji Tsuboi (1 out of 1 patent)

11.  Hirokuni Fujita (1 out of 1 patent)


8 patents:

1. 12522702 - Thin plate molding material and molded article (2026-01-13),
2. 12448511 - Unsaturated polyester resin composition, molding material, molded article, and battery pack housing for electric vehicles (2025-10-21),
3. 12435173 - Unsaturated polyester resin composition, molding material, and molded article (2025-10-07),
4. 12215224 - Unsaturated polyester resin composition, molding material, molded article, and battery pack casing for electric vehicle (2025-02-04),
5. 12037436 - Unsaturated polyester resin composition, molding material, molded article, and battery pack housing for electric vehicles (2024-07-16),
6. 11753520 - Unsaturated polyester resin composition, molding material, and molded article (2023-09-12),
7. 7604755 - Electroconductive resin composition and separator for fuel cell (2009-10-20),
8. 7125623 - Separator for solid polymer type fuel cell and process for producing the same (2006-10-24),
Company Overview
Japan Composite Co., Ltd. is a leading manufacturer and supplier of composite materials in Japan. With a strong focus on innovation and quality, we provide a wide range of composite products for various industries including automotive, aerospace, and construction. Our advanced manufacturing facilities and skilled team ensure that we deliver high-performance solutions to meet our customers' needs.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 27 2026

8 Patents

#2,152 in Tokyo

#5,050 in Japan

Tokyo, JP
Tokyo, Japan

Japan Composite Co., Ltd.

Forward Citations = 1

11 inventors:

goldMedal Masahiro Hakotani (6 out of 6 patents)

silverMedal Ikuo Akai (5 out of 5 patents)

bronzeMedal Takashi Tsukamoto (4 out of 34 patents)

4.  Hiroya Okumura (2 out of 6 patents)

5.  Takashi Shibata (1 out of 20 patents)

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