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Japan Servo Co.,ltd.

USPTO Granted Patents = 152

EPO Patents = 7

Forward Citations = 1,735

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158 inventors (with patents filed for the assignee):

Masafumi Sakamoto (41 out of 48 patents)

Naotaka Sasaki (19 out of 19 patents)

Kenji Sugaya (16 out of 19 patents)

4. Shoji Ohiwa (16 out of 17 patents)

5. Kazuo Ohnishi (14 out of 14 patents)

6. Yuji Enomoto (12 out of 66 patents)

7. Akio Takemori (11 out of 11 patents)

8. Yoshifumi Kuwano (11 out of 13 patents)

9. Shunichi Kawamata (11 out of 11 patents)

10. Yasuaki Motegi (9 out of 17 patents)

11. Hiroaki Taka (8 out of 10 patents)

12. Chio Ishihara (7 out of 25 patents)

13. Motoya Ito (7 out of 28 patents)

14. Kouki Isozaki (7 out of 8 patents)

15. Toshimi Abukawa (7 out of 23 patents)

Core Competencies:

Automatic Icemaker

Stepping Motor

Electric Rotating Machine

Axial Flow Fan

Permanent Magnet Motor

Centrifugal Fan

Magnetic Position Sensor

Hybrid Stepping Motor

Motor Control System

Brushless DC Motor

Claw Pole Motor

Lamination System

152 patents: Sort by Forward Citations

1. 7845180 - Automatic icemaker (2010-12-07),

2. 7728543 - Stepping motor controlling device (2010-06-01),

3. 7714475 - Multiple phase claw pole type motor (2010-05-11),

4. 7714466 - Claw-teeth-type rotating electrical machine (2010-05-11),

5. 7713036 - Roller-type liquid pumping apparatus with improved installation capability (2010-05-11),

6. 7665316 - Automatic icemaker (2010-02-23),

7. 7649298 - Claw teeth type electric rotary machine and manufacturing method for stators (2010-01-19),

8. 7626301 - Electric rotating machine having permanent magnets and method of manufacturing teeth portions of the stator iron core (2009-12-01),

9. 7622838 - Axial fan motor (2009-11-24),

10. 7605517 - Claw pole rotating electric machine (2009-10-20),

11. 7592734 - Three-phase permanent magnet brushless motor (2009-09-22),

12. 7567044 - Braking device for an electrically driven rotor (2009-07-28),

13. 7487645 - Automatic icemaker (2009-02-10),

14. 7470108 - Axial flow fan (2008-12-30),

15. 7446441 - Outer rotor type hybrid stepping motor (2008-11-04),

Japan Servo Co., Ltd. is a leading manufacturer and provider of high-quality servo motors and motion control systems. Established in 1955, the company has been at the forefront of innovation in the field of precision control technology. With a strong commitment to customer satisfaction, Japan Servo Co., Ltd. offers a wide range of reliable and efficient servo motor products to various industries including robotics, automation, aerospace, and more. Through its advanced manufacturing capabilities and dedication to continuous improvement, the company has earned a reputation for delivering cutting-edge solutions that meet the evolving needs of its global clientele.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 30 2025

152 Patents

#368 in Tokyo

#823 in Japan

#5,233 in the World

Japan Servo Co.,ltd.

Forward Citations = 1,735

158 inventors:

Masafumi Sakamoto (41 out of 48 patents)

Naotaka Sasaki (19 out of 19 patents)

Kenji Sugaya (16 out of 19 patents)

4. Shoji Ohiwa (16 out of 17 patents)

5. Kazuo Ohnishi (14 out of 14 patents)

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