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For the Inventor, By the Inventor

Tokyo, Japan

Fujikura Limited


USPTO Granted Patents = 1,874

% Expired Patents = 31.0



Trademarks = 10

Forward Citations = 10,407

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1,430 inventors (with patents filed for the assignee):

goldMedal Ken Osato (76 out of 81 patents)

silverMedal Ning Guan (63 out of 63 patents)

bronzeMedal 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:

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),
Company Overview
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 synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 6 2026

Fujikura Limited USPTO Patent Assignee Logo
1,874 Patents

#70 in Tokyo

#128 in Japan

#535 in the World

Tokyo, JP
Tokyo, Japan

Fujikura Limited

Forward Citations = 10,407

1,430 inventors:

goldMedal Ken Osato (76 out of 81 patents)

silverMedal Ning Guan (63 out of 63 patents)

bronzeMedal Shoichiro Matsuo (60 out of 60 patents)

4.  Katsuhiro Takenaga (57 out of 57 patents)

5.  Kunihiko Fujiwara (55 out of 58 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Fujikura Limited. Retrieved from https://idiyas.com/company/fujikura

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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