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Suwa-gun, Japan

Sankyo Seiki Mfg. Co., Ltd

USPTO Granted Patents = 264

Forward Citations = 2,182

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246 inventors (with patents filed for the assignee):

Masato Gomyo (20 out of 54 patents)

Hayato Naito (13 out of 23 patents)

Masamichi Hayakawa (12 out of 15 patents)

4. Tadashi Takeda (9 out of 57 patents)

5. Tamotsu Nose (9 out of 11 patents)

6. Hiroshi Sakashita (8 out of 22 patents)

7. Hideki Kanebako (7 out of 20 patents)

8. Seiichiro Noritake (7 out of 17 patents)

9. Mitsuo Yokozawa (7 out of 16 patents)

10. Kenji Hirasawa (7 out of 15 patents)

11. Motonori Usui (6 out of 10 patents)

12. Masayuki Katagiri (6 out of 22 patents)

13. Kazunori Takahashi (5 out of 31 patents)

14. Masayoshi Saichi (5 out of 20 patents)

15. Fusayoshi Aruga (5 out of 6 patents)

Core Competencies:

Optical Head Device

Card Reader

Dynamic Pressure Bearing

Motor Control

Linear Actuator

Fluid Dynamic Pressure Bearing

Magnetic Displacement Sensor

Electrolytic Machining

Nonvolatile Memory

Flow Control Device

Stepping Motor

Hydraulic Power Generation

264 patents: Sort by Forward Citations

1. 7522358 - Optical head device and manufacturing method therefor (2009-04-21),

2. 7306150 - Card reader (2007-12-11),

3. 7095148 - Motor with improved rotary shaft supporting structure (2006-08-22),

4. 7061231 - Device for measuring displacement including a displacement sensor with a detection coil and excitation coils (2006-06-13),

5. 7052386 - Curved surface cutting processing method (2006-05-30),

6. 7035507 - Manufacturing method for optical element (2006-04-25),

7. 7027377 - Optical head device and objective lens (2006-04-11),

8. 7005758 - Hydraulic power generating device (2006-02-28),

9. 7000836 - Method of self-testing IC card readers (2006-02-21),

10. 6991163 - Card reader (2006-01-31),

11. 6990992 - Damper device (2006-01-31),

12. 6984975 - Magnetic displacement sensor for sensing the position of an object (2006-01-10),

13. 6981688 - Flow control device (2006-01-03),

14. 6967586 - Bearing test method, bearing test device, bearing monitoring device and storage device (2005-11-22),

15. 6967421 - Core for motor, motor furnished to the core and method for manufacturing the motor (2005-11-22),

Sankyo Seiki Mfg. Co., Ltd is a leading manufacturing company specializing in the production of precision mechanical components. With a strong focus on innovation and quality, we have been delivering high-performance products for various industries since our establishment in 1963. Our expertise lies in manufacturing gears, gearboxes, and other mechanical devices that are essential in automotive, industrial, and consumer applications. Located in Japan, our advanced facilities and experienced team allow us to offer customized solutions to meet the unique requirements of our clients. Visit our website for more information about our company and the products we offer.

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

Company Badge

USPTO Data Jan 1 1976 - Jan 6 2026

264 Patents

#1 in Suwa-gun

#563 in Japan

#3,217 in the World

Suwa-gun, Japan

Sankyo Seiki Mfg. Co., Ltd

Forward Citations = 2,182

246 inventors:

Masato Gomyo (20 out of 54 patents)

Hayato Naito (13 out of 23 patents)

Masamichi Hayakawa (12 out of 15 patents)

4. Tadashi Takeda (9 out of 57 patents)

5. Tamotsu Nose (9 out of 11 patents)

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