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Kabushiki Kaisha Sankyo Seiki Seisakusho

USPTO Granted Patents = 307

Trademarks = 3

Forward Citations = 2,859

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289 inventors (with patents filed for the assignee):

Fumito Komatsu (20 out of 47 patents)

Masayuki Katagiri (16 out of 22 patents)

Yutaka Ishizuka (15 out of 17 patents)

4. Hiroshi Sakashita (13 out of 22 patents)

5. Tadashi Takeda (11 out of 57 patents)

6. Yoshio Hayashi (9 out of 15 patents)

7. Ikuo Kasuga (9 out of 15 patents)

8. Hiromitsu Takei (8 out of 19 patents)

9. Masato Gomyo (8 out of 54 patents)

10. Makoto Orii (8 out of 14 patents)

11. Kazuyoshi Yasukawa (8 out of 8 patents)

12. Katsuhiko Hayashi (7 out of 23 patents)

13. Koichi Katakura (7 out of 12 patents)

14. Akihiko Isaka (7 out of 11 patents)

15. Seiichiro Noritake (6 out of 17 patents)

Core Competencies:

Dynamic Pressure Bearings

Optical Pickup Devices

Magnetic Levitation Motors

Hydrodynamic Bearings

Card Ejecting Mechanisms

Diffraction Grating Elements

Valve Driving Apparatus

Color Detecting Sensors

Small Power Generating Devices

Magnetic Card Readers

Geared Motors

Fluid Flow Regulators

307 patents: Sort by Forward Citations

1. 7220054 - Dynamic pressure bearing apparatus (2007-05-22),

2. 7101084 - Dynamic pressure bearing device (2006-09-05),

3. 6991170 - Card ejecting mechanism (2006-01-31),

4. 6981647 - Foreign matter detecting mechanism, carriage moving mechanism and method for operating carriage moving mechanism (2006-01-03),

5. 6961298 - Optical head device having a plurality of optical elements with various transmission efficiencies (2005-11-01),

6. 6933644 - Magnetic levitation motor (2005-08-23),

7. 6890104 - Hydrodynamic bearing device (2005-05-10),

8. 6876100 - Small power generating device and water faucet device (2005-04-05),

9. 6825587 - Rotor motor with a resin coil bobbin (2004-11-30),

10. 6824062 - Card transporting mechanism for card reader (2004-11-30),

11. 6798819 - Optical pickup apparatus and method of manufacturing the same (2004-09-28),

12. 6793394 - Hydrodynamic bearing device (2004-09-21),

13. 6791824 - Tape running apparatus, motor board, and capstan motor (2004-09-14),

14. 6785200 - Diffraction grating element and optical pickup device incorporating the same (2004-08-31),

15. 6781776 - Magnetic card reader and magnetic data reproduction method using signal peak point intervals (2004-08-24),

Kabushiki Kaisha Sankyo Seiki Seisakusho is a Japanese company that specializes in manufacturing precision machinery and components. With over 50 years of experience, they have developed a strong reputation for delivering high-quality products to various industries, including automotive, aerospace, and medical. Their commitment to innovation and customer satisfaction has made them a trusted partner for many global companies. For more information, please visit their website.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 30 2025

307 Patents

#6 in Nagano

#518 in Japan

#2,831 in the World

Kabushiki Kaisha Sankyo Seiki Seisakusho

Forward Citations = 2,859

289 inventors:

Fumito Komatsu (20 out of 47 patents)

Masayuki Katagiri (16 out of 22 patents)

Yutaka Ishizuka (15 out of 17 patents)

4. Hiroshi Sakashita (13 out of 22 patents)

5. Tadashi Takeda (11 out of 57 patents)

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