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Hitachi Microcomputer Engineering, Ltd.

USPTO Granted Patents = 149

Forward Citations = 2,796

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385 inventors (with patents filed for the assignee):

Atsushi Hasegawa (23 out of 61 patents)

Tadahiko Nishimukai (15 out of 36 patents)

Ikuya Kawasaki (14 out of 43 patents)

4. Makoto Hanawa (10 out of 34 patents)

5. Kunio Uchiyama (8 out of 73 patents)

6. Takashi Tsukamoto (7 out of 21 patents)

7. Haruo Keida (7 out of 11 patents)

8. Kazuhiko Iwasaki (7 out of 15 patents)

9. Masaru Matsumura (6 out of 7 patents)

10. Shuuichi Miyaoka (5 out of 13 patents)

11. Yoshimune Hagiwara (5 out of 31 patents)

12. Toshikazu Arai (5 out of 5 patents)

13. Hiroshi Higuchi (5 out of 5 patents)

14. Isamu Kobayashi (4 out of 35 patents)

15. Hideo Nishijima (4 out of 116 patents)

Core Competencies:

Data Processor

Cache Memory

Semiconductor Integrated Circuit

Microcomputer

Dynamic Bus Control

Information Processing

Storage Controller

Pipeline Processor

Memory Device

Task Execution Control

Graphic Display

Voltage Limiter

149 patents: Sort by Forward Citations

1. 5974533 - Data processor (1999-10-26),

2. 5822761 - Data processing system which controls operation of cache memory based (1998-10-13),

3. 5809274 - Purge control for ON-chip cache memory (1998-09-15),

4. 5712859 - Semiconductor integrated circuit (1998-01-27),

5. 5680631 - Data processor with on-chip cache memory and purge controller responsive (1997-10-21),

6. 5638508 - Method and a system for processing a log record (1997-06-10),

7. 5619677 - Data processing system with an enhanced cache memory control (1997-04-08),

8. 5581698 - Semiconductor integrated circuit device with test mode for testing CPU (1996-12-03),

9. 5566185 - Semiconductor integrated circuit (1996-10-15),

10. 5509133 - Data processing system with an enhanced cache memory control (1996-04-16),

11. 5502825 - Data processing system with an enhanced cache memory control (1996-03-26),

12. 5497482 - Data processor in which external sync signal may be selectively inhibited (1996-03-05),

13. 5493686 - Data processor in which external sync signal may be selectively inhibited (1996-02-20),

14. 5493656 - Microcomputer with dynamic bus controls (1996-02-20),

15. 5493572 - Semiconductor integrated circuit with voltage limiter having different (1996-02-20),

Company Overview

Hitachi Microcomputer Engineering, Ltd., based in Tokyo, specializes in the development and manufacturing of advanced data processing systems. The company focuses on core technologies such as data processors, cache memory, and semiconductor integrated circuits, contributing to innovations in microcomputers and information processing. With expertise in dynamic bus control and storage controllers, Hitachi Microcomputer Engineering plays a pivotal role in enhancing the efficiency and performance of computing systems across various applications.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

149 Patents

#429 in Tokyo

#862 in Japan

#5,480 in the World

Hitachi Microcomputer Engineering, Ltd.

Forward Citations = 2,796

385 inventors:

Atsushi Hasegawa (23 out of 61 patents)

Tadahiko Nishimukai (15 out of 36 patents)

Ikuya Kawasaki (14 out of 43 patents)

4. Makoto Hanawa (10 out of 34 patents)

5. Kunio Uchiyama (8 out of 73 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Hitachi Microcomputer Engineering, Ltd.. Retrieved from https://idiyas.com/company/hitachi-microcomputer-engineering

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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