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Nagano-ken, Japan

Tamagawa Seiki Co., Ltd.

USPTO Granted Patents = 21

EPO Patents = 6

Trademarks = 12

Forward Citations = 45

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40 inventors (with patents filed for the assignee):

Hiroshi Kushihara (4 out of 13 patents)

Hirofumi Maruyama (4 out of 4 patents)

Masanori Yachi (4 out of 29 patents)

4. Shinichi Arai (3 out of 3 patents)

5. Nobuharu Hama (3 out of 3 patents)

6. Hiroshi Tanaka (3 out of 64 patents)

7. Kazuyuki Ishibashi (2 out of 2 patents)

8. Toshiki Muramatsu (2 out of 2 patents)

9. Katsutoshi Toyotake (2 out of 2 patents)

10. Yuki Endo (2 out of 7 patents)

11. Yoshimi Kikuchi (2 out of 7 patents)

12. Kanji Kitazawa (2 out of 8 patents)

13. Kazuhiro Ota (2 out of 3 patents)

14. Hisashi Mimura (2 out of 9 patents)

15. Hiroyuki Tsukashima (1 out of 10 patents)

21 patents: Sort by Forward Citations

1. 12191872 - R/D conversion method and R/D converter (2025-01-07),

2. 11879757 - Encoder installing structure and method using spigot unit (2024-01-23),

3. 11253947 - Magnet wire bonding method and bonding structure (2022-02-22),

4. 11226792 - Trigonometric function calculating device (2022-01-18),

5. 10084472 - Phase modulation-type redundant two-phase-output resolver and signal output method thereof (2018-09-25),

6. 9261986 - Trackball device and ultrasonic diagnostic apparatus (2016-02-16),

7. 9166503 - Actuator control system and actuator system (2015-10-20),

8. 8674687 - Angle detection device and method of manufacturing the same (2014-03-18),

9. 8669760 - Angle detection system and method of manufacturing the same (2014-03-11),

10. 8364432 - Analog angle sensor accuracy correction program correction method, recording medium, and servo driver (2013-01-29),

11. 8061048 - Apparatus for azimuth measurements using gyro sensors (2011-11-22),

12. 7987713 - Angular velocity sensor with mounting portion and cover (2011-08-02),

13. 7952065 - Position detector and a detected element having a pattern for generating a position signal formed thereon (2011-05-31),

14. 7928617 - Resolver fixing structure (2011-04-19),

15. 7877848 - Method for fabricating an angular velocity sensor (2011-02-01),

TAMAGAWA SEIKI CO., LTD. is a Japanese company specializing in motion control technology and precision equipment. Established in 1938, they have been a leading manufacturer of sensors, motors, and other motion control components. With a focus on continuous innovation, Tamagawa Seiki is committed to delivering high-quality products and solutions to industries such as robotics, automation, aerospace, and more. Their extensive product range includes encoders, resolvers, servo motors, linear motors, and torque motors. Visit their official website for more information and to explore their advanced motion control solutions.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 30 2025

21 Patents

#5 in Nagano-ken

#2,800 in Japan

#29,078 in the World

Nagano-ken, Japan

Tamagawa Seiki Co., Ltd.

Forward Citations = 45

40 inventors:

Hiroshi Kushihara (4 out of 13 patents)

Hirofumi Maruyama (4 out of 4 patents)

Masanori Yachi (4 out of 29 patents)

4. Shinichi Arai (3 out of 3 patents)

5. Nobuharu Hama (3 out of 3 patents)

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