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Harmonic Drive Systems Inc.

USPTO Granted Patents = 323

CIPO Patents = 1

EPO Patents = 82

Trademarks = 5

Forward Citations = 1,636

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148 inventors (with patents filed for the assignee):

Yoshihide Kiyosawa (55 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 (21 out of 23 patents)

6. Noboru Takizawa (19 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

Lubrication Method

Rotary Actuator

Rotary Encoder

Dual Absolute Encoder

Planetary Reduction Gear

Speed Reducer

Wave Generator

Tooth Profile Design

Hollow Strain-Wave Gear

Bearing Unit

Powder Lubrication

323 patents: Sort by Forward Citations

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

2. 12491571 - Gear skiving process method (2025-12-09),

3. 12442445 - Lubricating structure for gear tooth surface (2025-10-14),

4. 12359710 - Space rolling bearing and space strain wave gearing device (2025-07-15),

5. 12326186 - Strain wave gearing and actuator (2025-06-10),

6. 12292106 - Strain wave gearing (2025-05-06),

7. 12281699 - Lubrication method for gear device (2025-04-21),

8. 12234903 - Strain wave gearing and actuator (2025-02-25),

9. 12234902 - Strain wave gearing (2025-02-25),

10. 12222028 - Strain wave gearing (2025-02-11),

11. 12215768 - Strain wave gearing (2025-02-04),

12. 12209648 - Tooth profile designing method for strain wave gearing (2025-01-28),

13. 12203746 - Rotary encoder (2025-01-21),

14. 12095341 - Rotary actuator (2024-09-17),

15. 12092221 - Lubricant sealing structure, strain wave gearing, and actuator (2024-09-17),

Harmonic Drive Systems Inc. is a leading global provider of high-precision motion control products and solutions. With over 50 years of experience, Harmonic Drive Systems has pioneered small and lightweight precision gears, gearheads, and actuators that enable accurate and reliable motion control in various industries. Their innovative products and collaborative approach to customer projects have made them a trusted partner for demanding applications in robotics, aerospace, medical, and industrial automation.

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

Company Badge

USPTO Data Jan 1 1976 - Jan 13 2026

323 Patents

#233 in Tokyo

#499 in Japan

#2,704 in the World

Harmonic Drive Systems Inc.

Forward Citations = 1,636

148 inventors:

Yoshihide Kiyosawa (55 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 (21 out of 23 patents)

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