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USPTO Data Jan 1 1976 - Oct 13 2026
30 Patents
#49 in Saitama 343-0827
#2,306 in Japan
#21,888 in the World
Hitachi Tobu Semiconductor
Forward Citations = 1,123
55 inventors:
Hitachi Tobu Semiconductor
% Expired Patents = 23.3
Forward Citations = 1,123
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55 inventors (with patents filed for the assignee):
Hiroshi Inagawa (10 out of 37 patents)
Kentaro Oishi (10 out of 25 patents)
Nobuo Machida (10 out of 34 patents)
4. Toshio Sugano (7 out of 58 patents)
5. Seiichiro Tsukui (6 out of 16 patents)
6. Masayuki Watanabe (5 out of 26 patents)
7. Yoshiaki Wakashima (5 out of 15 patents)
8. Sugano Toshio (5 out of 10 patents)
9. Atsushi Sasayama (5 out of 9 patents)
10. Kunihiko Nishi (4 out of 103 patents)
11. Tugio Nemoto (4 out of 8 patents)
12. Haruo Kugimiya (4 out of 4 patents)
13. Kunio Aiki (4 out of 20 patents)
14. Aizo Kaneda (3 out of 50 patents)
15. Michiharu Honda (3 out of 12 patents)
Core Competencies:
Insulated Gate
Semiconductor Device
Stacked Memory
Integrated Circuit
Photoelectric Device
Hybrid Integrated Circuit
Optoelectronics
Memory Module
Mounting Arrangement
Manufacturing Process
High Packing Density
Resin-Encapsulated
30 patents:
1. 8377775 - Insulated gate type semiconductor device and method for fabricating the same (2013-02-19),
2. 8278708 - Insulated gate type semiconductor device and method for fabricating the same (2012-10-02),
3. 8168498 - Insulated gate type semiconductor device and method for fabricating the same (2012-05-01),
4. 8148224 - Insulated gate type semiconductor device and method for fabricating the same (2012-04-03),
5. 7910990 - Insulated gate type semiconductor device and method for fabricating the same (2011-03-22),
6. 7843001 - Insulated gate type semiconductor device and method for fabricating the same (2010-11-30),
7. 7585732 - Insulated gate type semiconductor device and method for fabricating the same (2009-09-08),
8. 7361557 - Insulated gate type semiconductor device and method for fabricating the same (2008-04-22),
9. 7172941 - Insulated gate type semiconductor device and method for fabricating the same (2007-02-06),
Company Overview
Hitachi Tobu Semiconductor is a prominent player in the semiconductor industry, specializing in the design and manufacture of high-performance semiconductor devices. The company focuses on various applications, including automotive electronics, industrial equipment, and consumer electronics, leveraging advanced technology to meet evolving market demands. Based in Saitama, Japan, Hitachi Tobu Semiconductor is committed to innovation and quality, contributing to the advancement of technology across multiple sectors.
Profile summary synthesized from public USPTO records and patent filings.
IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Hitachi Tobu Semiconductor. Retrieved from https://idiyas.com/company/hitachi-tobu-semiconductor
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]
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]
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]