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Kanagawa, Japan

Hitachi Information Technology Co., Ltd.

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USPTO Granted Patents = 21

% Expired Patents = 42.9

CIPO Patents = 1

Forward Citations = 244

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73 inventors (with patents filed for the assignee):

Masaki Yoshinaga (3 out of 10 patents)

Noriaki Hatanaka (3 out of 9 patents)

Yuji Nagaya (3 out of 7 patents)

4. Tatsuo Mochizuki (3 out of 5 patents)

5. Katsuya Sonoyama (3 out of 5 patents)

6. Takashi Hashimoto (3 out of 86 patents)

7. Nobuhito Matsuyama (2 out of 29 patents)

8. Takeshi Aimoto (2 out of 59 patents)

9. Tatsuki Ishii (2 out of 8 patents)

10. Yukihiro Takatani (1 out of 3 patents)

11. Tomoji Nakamura (1 out of 3 patents)

12. Naomichi Nonaka (1 out of 31 patents)

13. Takeki Yazaki (1 out of 65 patents)

14. Yoshikazu Kiyoshige (1 out of 8 patents)

15. Norihiko Moriwaki (1 out of 40 patents)

21 patents: Sort by Forward Citations

1. 7869441 - Variable length packet communication device (2011-01-11),

2. 7840675 - Multi node server system (2010-11-23),

3. 7518233 - Sealing structure for multi-chip module (2009-04-14),

4. 7363614 - Automatic test program generation method (2008-04-22),

5. 7295512 - Performance enhanced TCP communication system (2007-11-13),

6. 7013443 - Delay diagnosis method for semiconductor integrated circuit, computer program product for diagnosing delay of semiconductor integrated circuit and computer readable recording medium recording program thereon (2006-03-14),

7. 6944840 - Design method and system for achieving a minimum machine cycle for semiconductor integrated circuits (2005-09-13),

8. 6922803 - Test method of semiconductor intergrated circuit and test pattern generator (2005-07-26),

9. 6894882 - D.C. power supply circuit and electronic apparatus using such circuits (2005-05-17),

10. 6845435 - Data backup in presence of pending hazard (2005-01-18),

11. 6163218 - Signal amplifier apparatus and magnetic disk storage apparatus using the (2000-12-18),

12. 616321 - Signal amplifier apparatus and magnetic disk storage apparatus using the (2000-12-19),

13. 6145024 - Input/output optical fiber serial interface link that selectively (2000-11-07),

14. 6137781 - Communication network system (2000-10-24),

15. 6125443 - Interrupt processing system and method for information processing system (2000-09-26),

Company Overview

Hitachi Information Technology Co., Ltd., based in Kanagawa, Japan, specializes in advanced information technology solutions and services. The company focuses on developing innovative software and systems that enhance data management, analytics, and cloud computing capabilities. With a commitment to integrating cutting-edge technologies, Hitachi aims to support various industries in optimizing their operations and improving decision-making processes through intelligent data utilization and robust IT infrastructure.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 27 2026

21 Patents

#97 in Kanagawa

#2,868 in Japan

#30,018 in the World

Kanagawa, Japan

Hitachi Information Technology Co., Ltd.

Forward Citations = 244

73 inventors:

Masaki Yoshinaga (3 out of 10 patents)

Noriaki Hatanaka (3 out of 9 patents)

Yuji Nagaya (3 out of 7 patents)

4. Tatsuo Mochizuki (3 out of 5 patents)

5. Katsuya Sonoyama (3 out of 5 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Hitachi Information Technology Co., Ltd.. Retrieved from https://idiyas.com/company/hitachi-information-technology-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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