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Hitachi Microcomputer System, Ltd.

USPTO Granted Patents = 64

Forward Citations = 1,370

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244 inventors (with patents filed for the assignee):

Yasushi Akao (7 out of 52 patents)

Mitsuru Watabe (7 out of 61 patents)

Shumpei Kawasaki (7 out of 27 patents)

4. Eiji Sakakibara (7 out of 13 patents)

5. Kaoru Fukada (7 out of 14 patents)

6. Shigeki Masumura (7 out of 19 patents)

7. Kouki Noguchi (7 out of 45 patents)

8. Akira Yamamoto (6 out of 416 patents)

9. Kazunari Suzuki (6 out of 56 patents)

10. Kunihiro Tsubosaki (6 out of 85 patents)

11. Shuya Fujita (5 out of 11 patents)

12. Takanaga Yamazaki (4 out of 28 patents)

13. Shiro Baba (4 out of 60 patents)

14. Yoichi Asano (4 out of 13 patents)

15. Katsuhiko Ishida (4 out of 13 patents)

Core Competencies:

Microcomputer

Semiconductor Device

Network System

Data Processing

Graphics Display

Emulator

Speech Recognition

Signal Processor

Neuro-computer

Storage Control

Phase Lock Loop

Battery Protection

64 patents: Sort by Forward Citations

1. 6148411 - Network system having function of changing route upon failure (2000-11-14),

2. 6131154 - Microcomputer having variable bit width area for displacement (2000-10-10),

3. 6112174 - Recognition dictionary system structure and changeover method of speech (2000-08-29),

4. 6060770 - Semiconductor device and process for producing the same (2000-05-09),

5. 6055651 - Emulator and corresponding trace control method (2000-04-25),

6. 6046770 - Imaging apparatus (2000-04-04),

7. 6032266 - Network system having function of changing route upon failure (2000-02-29),

8. 5991545 - Microcomputer having variable bit width area for displacement and (1999-11-23),

9. 5987589 - Microcomputer and microcomputer system (1999-11-16),

10. 5969976 - Division circuit and the division method thereof (1999-10-19),

11. 5946548 - Method for manufacturing a MISFET device where the conductive film has a (1999-08-31),

12. 5904556 - Method for making semiconductor integrated circuit device having (1999-05-18),

13. 5896025 - Secondary battery protection device from overcharge/overdischarge (1999-04-20),

14. 5874773 - Lead frame having a supporting pad with a plurality of slits arranged to (1999-02-23),

15. 5869888 - Semiconductor device with lead structure on principal surface of chip (1999-02-09),

Company Overview

Hitachi Microcomputer System, Ltd., based in Tokyo, specializes in the development and manufacturing of advanced microcomputer technologies. The company focuses on a diverse range of core technology topics, including semiconductor devices, network systems, data processing, and graphics display solutions. Additionally, Hitachi is engaged in innovative areas such as emulation, speech recognition, and signal processing, contributing to various applications across industries. Its commitment to research and development positions it as a key player in the microcomputer sector.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

64 Patents

#704 in Tokyo

#1,487 in Japan

#11,476 in the World

Hitachi Microcomputer System, Ltd.

Forward Citations = 1,370

244 inventors:

Yasushi Akao (7 out of 52 patents)

Mitsuru Watabe (7 out of 61 patents)

Shumpei Kawasaki (7 out of 27 patents)

4. Eiji Sakakibara (7 out of 13 patents)

5. Kaoru Fukada (7 out of 14 patents)

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

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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