% Expired Patents = 33.3

Forward Citations = 2

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5 inventors (with patents filed for the assignee):

Noboru Fukuhara (5 out of 31 patents)

Hisashi Yamada (3 out of 19 patents)

Takenori Osada (3 out of 9 patents)

4. Tsuyoshi Nakano (2 out of 20 patents)

5. Takayuki Inoue (2 out of 5 patents)

6 patents: Sort by Forward Citations

1. 7732836 - Compound semiconductor epitaxial substrate and method for manufacturing the same (2010-06-08),

2. 7576352 - Method for producing compound semiconductor wafer and compound semiconductor device (2009-08-18),

3. 7550786 - Compound semiconductor epitaxial substrate (2009-06-23),

4. 7304332 - Compound semiconductor epitaxial substrate and method for manufacturing same (2007-12-04),

5. 7291873 - High electron mobility epitaxial substrate (2007-11-06),

6. 7208387 - Method for manufacturing compound semiconductor wafer and compound semiconductor device (2007-04-24),

Company Overview

Sumika Epi Solutions Company, Ltd. is a leading provider of high quality epitaxial wafers for the semiconductor industry. With advanced technology and industry expertise, the company offers a wide range of products and services to meet the needs of their customers. They strive for excellence in producing innovative solutions for the ever-evolving semiconductor market.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

6 Patents

#2,469 in Tokyo

#5,989 in Japan

Tokyo, Japan

Sumika Epi Solution Company, Ltd.

Forward Citations = 2

5 inventors:

Noboru Fukuhara (5 out of 31 patents)

Hisashi Yamada (3 out of 19 patents)

Takenori Osada (3 out of 9 patents)

4. Tsuyoshi Nakano (2 out of 20 patents)

5. Takayuki Inoue (2 out of 5 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Sumika Epi Solution Company, Ltd.. Retrieved from https://idiyas.com/company/sumika-epi-solution-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]