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Fujikura Limited

USPTO Granted Patents = 1,874

% Expired Patents = 31.0

CIPO Patents = 22

EPO Patents = 528

Trademarks = 10

Forward Citations = 10,407

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1,432 inventors (with patents filed for the assignee):

Ken Osato (76 out of 81 patents)

Ning Guan (63 out of 63 patents)

Shoichiro Matsuo (60 out of 60 patents)

4. Katsuhiro Takenaga (57 out of 57 patents)

5. Kunihiko Fujiwara (55 out of 58 patents)

6. Kuniharu Himeno (52 out of 52 patents)

7. Yusuke Uemichi (45 out of 45 patents)

8. Masataka Mochizuki (42 out of 70 patents)

9. Akito Nishimura (35 out of 36 patents)

10. Kenji Okada (32 out of 32 patents)

11. Naoki Okada (32 out of 34 patents)

12. Noriyuki Kawanishi (31 out of 31 patents)

13. Kazuhiro Takizawa (31 out of 42 patents)

14. Akira Namazue (29 out of 31 patents)

15. Kenichi Okada (29 out of 69 patents)

Core Competencies:

Optical Connector

Fiber Laser

Optical Computation

Optical Fiber

Digital Phase Shifter

Antenna Module

Wiring Board

Capacitance Sensor

Optical Amplification

Multi-Core Optical Fiber

Laser Device

Optical Transceiver

1,874 patents: Sort by Forward Citations

1. 12756111 - Array antenna (2026-10-06),

2. 12754354 - Optical computing device and method for manufacturing optical computing device (2026-10-06),

3. 12754100 - Crosstalk measuring method, and crosstalk measuring device (2026-10-06),

4. 12753978 - Cold plate and method for manufacturing cold plate (2026-10-06),

5. 12748453 - Optical computing device, optical computing method, and manufacturing method for optical computing device (2026-09-29),

6. 12747183 - Optical fiber preform production method, optical fiber preform, and optical fiber production method (2026-09-29),

7. 12744362 - Fiber structure, optical combiner, laser light source, and laser device (2026-09-22),

8. D1147943 - Ferrule for optical fiber connectors (2026-09-15),

9. 12736721 - Optical computing device and optical computing method (2026-09-15),

10. 12730352 - Optical switch and switching method (2026-09-08),

11. 12725994 - Rare-earth doped fiber and fiber laser apparatus (2026-09-01),

12. 12724284 - Optical computation device and optical computation method (2026-09-01),

13. 12724216 - Optical fiber ribbon (2026-09-01),

14. 12717108 - Method and system for manufacturing optical fiber ribbon (2026-08-25),

15. 12717105 - Optical fiber cable (2026-08-25),

Fujikura Limited, headquartered in Tokyo, Japan, is a leader in optical fiber technology, specializing in the development and manufacturing of advanced optical connectors, fiber lasers, and optical computation systems. The company is dedicated to innovation in various domains, including digital phase shifters, antenna modules, wiring boards, and capacitance sensors. With a strong emphasis on research and development, Fujikura continues to enhance connectivity solutions and optical technologies, contributing significantly to telecommunications and industrial applications.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

Fujikura Limited

1,874 Patents

#70 in Tokyo

#128 in Japan

#535 in the World

Fujikura Limited

Forward Citations = 10,407

1,432 inventors:

Ken Osato (76 out of 81 patents)

Ning Guan (63 out of 63 patents)

Shoichiro Matsuo (60 out of 60 patents)

4. Katsuhiro Takenaga (57 out of 57 patents)

5. Kunihiko Fujiwara (55 out of 58 patents)

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