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Harmonic Drive Systems Inc.

USPTO Granted Patents = 326

% Expired Patents = 0.61

CIPO Patents = 1

EPO Patents = 87

Trademarks = 4

Forward Citations = 1,681

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149 inventors (with patents filed for the assignee):

Yoshihide Kiyosawa (56 out of 57 patents)

Masaru Kobayashi (54 out of 55 patents)

Shoichi Ishikawa (33 out of 38 patents)

4. Norio Shirokoshi (27 out of 30 patents)

5. Jun Handa (22 out of 23 patents)

6. Noboru Takizawa (20 out of 20 patents)

7. Junji Koyama (16 out of 16 patents)

8. Toshiki Maruyama (14 out of 14 patents)

9. Naoki Kanayama (13 out of 13 patents)

10. Tatsuro Hoshina (11 out of 11 patents)

11. Nozomu Tanioka (11 out of 11 patents)

12. Kunio Miyashita (11 out of 11 patents)

13. Kiyoto Kobayashi (10 out of 10 patents)

14. Kozo Sasaki (10 out of 10 patents)

15. Hiroaki Kimura (9 out of 37 patents)

Core Competencies:

Strain Wave Gearing

Torque Sensor

Lubrication Method

Rotary Actuator

Speed Reducer

Wave Generator

Tooth Profile

Bearing Unit

Dual Absolute Encoder

Powder Lubrication

Hollow Gear Device

Rotary Encoder

326 patents: Sort by Forward Citations

1. 12617038 - Laser welding method (2026-05-05),

2. 12590620 - Strain wave gearing having torque sensor (2026-03-31),

3. 12535110 - Brake for motor (2026-01-27),

4. D1109202 - Speed reducer (2026-01-13),

5. 12491571 - Gear skiving process method (2025-12-09),

6. 12442445 - Lubricating structure for gear tooth surface (2025-10-14),

7. 12359710 - Space rolling bearing and space strain wave gearing device (2025-07-15),

8. 12326186 - Strain wave gearing and actuator (2025-06-10),

9. 12292106 - Strain wave gearing (2025-05-06),

10. 12281699 - Lubrication method for gear device (2025-04-21),

11. 12234903 - Strain wave gearing and actuator (2025-02-25),

12. 12234902 - Strain wave gearing (2025-02-25),

13. 12222028 - Strain wave gearing (2025-02-11),

14. 12215768 - Strain wave gearing (2025-02-04),

15. 12209648 - Tooth profile designing method for strain wave gearing (2025-01-28),

Harmonic Drive Systems Inc., headquartered in Tokyo, specializes in the development and manufacturing of precision motion control components, particularly in the field of strain wave gearing. Their innovative technologies encompass a range of applications, including rotary actuators, speed reducers, and torque sensors, which are crucial for various industries such as robotics, aerospace, and automation. The company is recognized for its advanced lubrication methods and unique tooth profile designs, enhancing performance and reliability in demanding environments.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

Harmonic Drive Systems Inc.

326 Patents

#262 in Tokyo

#511 in Japan

#2,763 in the World

Harmonic Drive Systems Inc.

Forward Citations = 1,681

149 inventors:

Yoshihide Kiyosawa (56 out of 57 patents)

Masaru Kobayashi (54 out of 55 patents)

Shoichi Ishikawa (33 out of 38 patents)

4. Norio Shirokoshi (27 out of 30 patents)

5. Jun Handa (22 out of 23 patents)

Please report any incorrect information to [email protected]

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