Forward Citations = 54

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12 inventors (with patents filed for the assignee):

Masahiro Takahashi (1 out of 14 patents)

Tadaaki Isobe (1 out of 22 patents)

Takuji Hamada (1 out of 16 patents)

4. Kikue Niitsuma (1 out of 1 patent)

5. Shigeru Wakena (1 out of 1 patent)

6. Kinya Eguchi (1 out of 2 patents)

7. Masayoshi Ezawa (1 out of 6 patents)

8. Masaaki Imamura (1 out of 7 patents)

9. Toshihiko Uchiyama (1 out of 4 patents)

10. Ken Onuki (1 out of 6 patents)

11. Katsuhiko Yoneda (1 out of 4 patents)

12. Eiichi Takasuna (1 out of 2 patents)

4 patents: Sort by Forward Citations

1. 4922104 - Infrared microspectrometer (1990-05-01),

2. 4855993 - Method and apparatus for detecting a fault in a ring network data (1989-08-08),

3. 4844963 - Magnetic disk and method of manufacturing same (1989-07-04),

4. 4843543 - Storage control method and apparatus (1989-06-27),

Hitachi, Ltd. is a Japanese multinational conglomerate company headquartered in Tokyo. It operates 11 business segments including Information & Telecommunication Systems, Social Infrastructure, High Functional Materials & Components, and more. With a focus on Social Innovation Business, Hitachi aims to contribute to society through its products, technologies, and services.

Profile summary based on public USPTO records.

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USPTO Data Jan 1 1976 - Sep 29 2026

4 Patents

#1 in Chiyoda

#7,569 in Japan

Chiyoda, Japan

501 Hitachi, Ltd.