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Hitachi Tohbu Semiconductor, Ltd.

USPTO Granted Patents = 35

% Expired Patents = 34.3

Forward Citations = 426

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122 inventors (with patents filed for the assignee):

Toshiyuki Hata (9 out of 58 patents)

Kazuya Takahashi (7 out of 62 patents)

Yasushi Takahashi (7 out of 73 patents)

4. Ryoichi Kajiwara (7 out of 33 patents)

5. Toshiaki Morita (7 out of 38 patents)

6. Masahiro Koizumi (7 out of 21 patents)

7. Munehisa Kishimoto (7 out of 22 patents)

8. Toshinori Hirashima (7 out of 24 patents)

9. Shigeru Ishii (7 out of 9 patents)

10. Keiichi Ookawa (7 out of 9 patents)

11. Hiroshi Sato (7 out of 17 patents)

12. Tetsuaki Adachi (6 out of 42 patents)

13. Yasuhiro Nunogawa (5 out of 26 patents)

14. Toshio Sugano (4 out of 58 patents)

15. Hiroki Nakajima (4 out of 7 patents)

Core Competencies:

MOSFET Package

Semiconductor Device

Integrated Circuit

High Frequency Amplifier

Wireless Communication

Non-Volatile Memory

Signal Processor

Image Input System

Drive Control System

Hybrid Optical Integration

Memory Module

Fabrication Apparatus

35 patents: Sort by Forward Citations

1. 8455986 - Mosfet package (2013-06-04),

2. 8183607 - Semiconductor device (2012-05-22),

3. 7985991 - MOSFET package (2011-07-26),

4. 7525813 - Semiconductor device (2009-04-28),

5. 7400002 - MOSFET package (2008-07-15),

6. 7394146 - MOSFET package (2008-07-01),

7. 7351946 - Semiconductor integrated circuit device and imaging system (2008-04-01),

8. 7342267 - MOSFET package (2008-03-11),

9. 7332757 - MOSFET package (2008-02-19),

10. 7278577 - Image input system (2007-10-09),

11. 7145394 - High frequency power amplifier module, and wireless communication system (2006-12-05),

12. 7122775 - Semiconductor integrated circuit device and imaging system (2006-10-17),

13. 7084055 - Method for manufacturing semiconductor integrated circuit device (2006-08-01),

14. 7068521 - Semiconductor device (2006-06-27),

15. 6986072 - Register capable of corresponding to wide frequency band and signal generating method using the same (2006-01-10),

Company Overview

Hitachi Tohbu Semiconductor, Ltd. specializes in the development and manufacturing of semiconductor products, focusing on advanced technologies for various applications. The company is known for its expertise in power devices, analog ICs, and microcontrollers, catering to industries such as automotive, consumer electronics, and industrial automation. Based in Gunma, Japan, Hitachi Tohbu plays a significant role in the semiconductor landscape, contributing to innovations that enhance performance and efficiency across multiple sectors.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

35 Patents

#9 in Gunma

#2,130 in Japan

#19,168 in the World

Hitachi Tohbu Semiconductor, Ltd.

Forward Citations = 426

122 inventors:

Toshiyuki Hata (9 out of 58 patents)

Kazuya Takahashi (7 out of 62 patents)

Yasushi Takahashi (7 out of 73 patents)

4. Ryoichi Kajiwara (7 out of 33 patents)

5. Toshiaki Morita (7 out of 38 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Hitachi Tohbu Semiconductor, Ltd.. Retrieved from https://idiyas.com/company/hitachi-tohbu-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]

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