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Seiko Precision Inc.

USPTO Granted Patents = 254

% Expired Patents = 40.6

EPO Patents = 1

Forward Citations = 835

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160 inventors (with patents filed for the assignee):

Hiroshi Takahashi (34 out of 71 patents)

Yoichi Nakano (29 out of 31 patents)

Seiichi Oishi (27 out of 27 patents)

4. Hisashi Kawamoto (24 out of 26 patents)

5. Shoichi Tokura (19 out of 19 patents)

6. Takashi Nakano (14 out of 24 patents)

7. Hajime Oda (12 out of 40 patents)

8. Mitsuru Suzuki (11 out of 11 patents)

9. Phichet Numnual (11 out of 11 patents)

10. Kenichi Kudo (10 out of 12 patents)

11. Minori Murata (10 out of 10 patents)

12. Chiaki Nemoto (10 out of 10 patents)

13. Kazuo Akimoto (10 out of 25 patents)

14. Motoharu Sakurai (9 out of 10 patents)

15. Koji Yoneda (9 out of 9 patents)

Core Competencies:

Focal Plane Shutter

Blade Drive Device

Optical Instrument

Imaging Apparatus

Diaphragm Device

X-Ray Processing

Actuator

Time Recorder

Lens Drive Device

Light Amount Adjusting

Speed Reducing Mechanism

Printing Apparatus

254 patents: Sort by Forward Citations

1. 10670134 - Gear box, driving device, and electronic apparatus (2020-06-02),

2. 10281800 - Blade drive device and optical instrument (2019-05-07),

3. 10281799 - Imaging apparatus and blade-driving device (2019-05-07),

4. 10165193 - Image pickup device and focal plane shutter (2018-12-25),

5. 10156772 - Blade drive device and optical instrument (2018-12-18),

6. 10101635 - Blade drive device and optical apparatus (2018-10-16),

7. 9971231 - Diaphragm device and optical instrument (2018-05-15),

8. 9906699 - Blade drive device and optical apparatus (2018-02-27),

9. 9904145 - Blade drive device and optical instrument (2018-02-27),

10. D799992 - Time recorder (2017-10-17),

11. 9762820 - Imaging device and focal plane shutter (2017-09-12),

12. 9742256 - Actuator (2017-08-22),

13. 9733547 - Blade driving device and optical apparatus (2017-08-15),

14. 9671678 - Focal-plane shutter and optical apparatus (2017-06-06),

15. 9671677 - Focal-plane shutter and optical apparatus (2017-06-06),

Seiko Precision Inc., based in Chiba, Japan, specializes in the development and manufacturing of advanced optical devices. The company focuses on a range of core technologies including focal plane shutters, blade drive devices, and various optical instruments. Its expertise extends to imaging apparatuses and diaphragm devices, as well as x-ray processing and actuators. Seiko Precision is committed to innovation in the optical field, contributing to various applications that enhance imaging and precision in multiple industries.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Sep 29 2026

254 Patents

#4 in Chiba

#601 in Japan

#3,431 in the World

Seiko Precision Inc.

Forward Citations = 835

160 inventors:

Hiroshi Takahashi (34 out of 71 patents)

Yoichi Nakano (29 out of 31 patents)

Seiichi Oishi (27 out of 27 patents)

4. Hisashi Kawamoto (24 out of 26 patents)

5. Shoichi Tokura (19 out of 19 patents)

Please report any incorrect information to [email protected]

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