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For the Inventor, By the Inventor

Nagano-ken, Japan

Tamagawa Seiki Kabushiki Kaisha


USPTO Granted Patents = 74


Forward Citations = 657

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55 inventors (with patents filed for the assignee):

goldMedal Hiroshi Kushihara (9 out of 13 patents)

silverMedal Tsuneo Sugiura (9 out of 9 patents)

bronzeMedal Hisashi Mimura (7 out of 9 patents)

4.  Kanji Kitazawa (5 out of 8 patents)

5.  Hiromi Ohshita (5 out of 5 patents)

6.  Hiromasa Miura (4 out of 4 patents)

7.  Toshiyuki Noda (3 out of 3 patents)

8.  Takaji Yasui (3 out of 3 patents)

9.  Yosuke Takaba (3 out of 3 patents)

10.  Sokichi Hayashi (3 out of 3 patents)

11.  Shigeo Seki (3 out of 3 patents)

12.  Tomio Nakata (3 out of 3 patents)

13.  Masanori Abe (2 out of 22 patents)

14.  Hiroshi Handa (2 out of 19 patents)

15.  Takashi Nakagawa (2 out of 95 patents)


Core Competencies:
Servo Motors
Rotary Angle Detectors
Spherical Ferrite Nanoparticles
Hybrid Stepping Motors
Resolver Technology
Sensor Systems
Digital Signal Conversion
Stator Structures
Non-Contact Connectors
Winding Methods
Encoder Technologies
Power Generation Control

74 patents:

1. 9641052 - Connector of vehicular angled connector-integrated servo motor and production method thereof (2017-05-02),
2. 8399022 - Spherical ferrite nanoparticles and method for producing the same (2013-03-19),
3. 8394413 - Spherical ferrite nanoparticles and method for producing the same (2013-03-12),
4. 7852069 - Rotary angle detector (2010-12-14),
5. 7816912 - Angle detector including distinct magnetic stator portions (2010-10-19),
6. 7476996 - Resolver external conductor fixing structure (2009-01-13),
7. 7388527 - Method of detecting abnormality of R/D converter (2008-06-17),
8. 7298138 - Stator structure for a rotation detector (2007-11-20),
9. 7102318 - Servo motor with a built-in drive circuit (2006-09-05),
10. 7042188 - Servo motor with a built-in drive circuit (2006-05-09),
11. 6950633 - Rotary non-contact connector and non-rotary non-contact connector (2005-09-27),
12. 6933698 - Method of driving a servo motor with a built-in drive circuit (2005-08-23),
13. 6930423 - Rotation angle detector (2005-08-16),
14. 6891492 - Method of converting an analog signal into a digital signal (2005-05-10),
15. 6873074 - Terminal connection structure of a resolver stator coil (2005-03-29),
Tamagawa Seiki Kabushiki Kaisha is a leading manufacturer of high-precision gyroscopes, encoders, and motors. With over 80 years of experience, Tamagawa Seiki has earned a reputation for delivering innovative and reliable motion control solutions for various industries, including robotics, aerospace, automotive, and medical. Their commitment to quality and customer satisfaction has made them a trusted partner for global companies seeking advanced motion sensing and control technology.
This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Dec 30 2025

74 Patents

#1 in Nagano-ken

#1,331 in Japan

#9,842 in the World

...
Nagano-ken, Japan

Tamagawa Seiki Kabushiki Kaisha

Forward Citations = 657

55 inventors:

goldMedal Hiroshi Kushihara (9 out of 13 patents)

silverMedal Tsuneo Sugiura (9 out of 9 patents)

bronzeMedal Hisashi Mimura (7 out of 9 patents)

4.  Kanji Kitazawa (5 out of 8 patents)

5.  Hiromi Ohshita (5 out of 5 patents)

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