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Hitachi Engineering Service Co., Ltd.

USPTO Granted Patents = 4

Forward Citations = 69

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13 inventors (with patents filed for the assignee):

Hiraku Ikeda (1 out of 21 patents)

Akira Okabe (1 out of 5 patents)

Hisanori Okamura (1 out of 36 patents)

4. Zenji Yamaguchi (1 out of 2 patents)

5. Akiyo Ichihashi (1 out of 2 patents)

6. Yukio Ishigaki (1 out of 8 patents)

7. Morihiro Kubo (1 out of 2 patents)

8. Minoru Yanagibashi (1 out of 1 patent)

9. Satoshi Kokura (1 out of 9 patents)

10. Takao Yoneyama (1 out of 6 patents)

11. Ichiya Sato (1 out of 7 patents)

12. Yoshimitsu Onoda (1 out of 5 patents)

13. Hiroshi Goko (1 out of 1 patent)

4 patents: Sort by Forward Citations

1. 6999903 - Remote monitoring diagnostic system and method thereof (2006-02-14),

2. 5325012 - Bonded type piezoelectric apparatus, method for manufacturing the same (1994-06-28),

3. 5218505 - Superconductor coil system and method of operating the same (1993-06-08),

4. 4690251 - Emergency control system for elevators (1987-09-01),

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USPTO Data Jan 1 1976 - Dec 9 2025

4 Patents

#2,786 in Tokyo

#7,416 in Japan

Hitachi Engineering Service Co., Ltd.

Forward Citations = 69

13 inventors:

Hiraku Ikeda (1 out of 21 patents)

Akira Okabe (1 out of 5 patents)

Hisanori Okamura (1 out of 36 patents)

4. Zenji Yamaguchi (1 out of 2 patents)

5. Akiyo Ichihashi (1 out of 2 patents)

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