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For the Inventor, By the Inventor

Sakura, Japan

Katsuhiro Takenaga

This inventor holds 57 USPTO granted patents and 6 published patent applications and 9 EPO patents, primarily in Multicore Fiber Technology (CPC class G02B). Top assignees: Fujikura Limited, Hokkaido University, Nippon Telegraph and Telephone Corporation. Active years: 2006-2026.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Katsuhiro Takenaga. Retrieved from https://idiyas.com/inventor/katsuhiro-takenaga

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

USPTO Granted Patents = 57 

% Patents Active = 66.7

 

Average Co-Inventor Count = 2.7

ph-index = 8

Forward Citations = 254(Granted Patents)

Forward Citations (Not Self Cited) = 235(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Sakura, JP (2006 - 2023)
  • Chiba, JP (2019 - 2024)

Company Filing History:

goldMedal57 out of 1,874 
 
Fujikura Limited
 patents
silverMedal18 out of 442 
 
Hokkaido University
 patents
bronzeMedal5 out of 5,300 
 
Nippon Telegraph and Telephone Corporation
 patents
4. 4 out of 89 
 
Osaka Prefecture University
 patents
5. 2 out of 29 
 
Shimane University
 patents
6. 1 out of 292 
 
Technical University of Denmark
 patents
where one patent can have more than one assignee

Years Active: 2006-2026

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Areas of Expertise:
Multicore Fiber
Optical Fiber
Optical Connector
Fiber Amplifier
Optical Transmission
Crosstalk Measurement
Fiber Module
Bidirectional Transmission
Preform Production
Communication Systems
Fan-in/fan-out Device
Coupled Multicore Fiber
57 patents (USPTO):Explore Patents
1. 12754100 - Crosstalk measuring method, and crosstalk measuring device (2026-10-06),
2. 12747183 - Optical fiber preform production method, optical fiber preform, and optical fiber production method (2026-09-29),
3. 12459853 - Multi-core optical fiber preform, multi-core optical fiber preform production method, and multi-core optical fiber production method (2025-11-04),
4. 12092879 - Multicore fiber, optical fiber cable, and optical connector (2024-09-17),
5. 12092859 - Multicore fiber, optical fiber cable, and optical connector (2024-09-17),
6. 11960120 - Method for aligning multicore fiber, method for manufacturing multicore fiber connector, device for aligning multicore fiber, and multicore fiber fusion splicing machine (2024-04-16),
7. 11834365 - Optical fiber preform production method, optical fiber preform, and optical fiber production method (2023-12-05),
8. 10690843 - Multicore fiber (2020-06-23),
9. 10663653 - Multicore fiber for communication (2020-05-26),
10. 10656327 - Optical fiber (2020-05-19),
11. 10488297 - Characteristic-measuring apparatus and characteristic-measuring method for multi-core fiber (2019-11-26),
12. 10444113 - Method of measuring crosstalk of multicore fiber and apparatus of measuring the same (2019-10-15),
13. 10365429 - Multicore fiber and optical cable (2019-07-30),
14. 10310176 - Multi-core fiber (2019-06-04),
15. 10295736 - Multicore fiber (2019-05-21),

Title: The Innovative Journey of Inventor Katsuhiro Takenaga

Introduction: Katsuhiro Takenaga is a pioneering inventor hailing from Sakura, Japan. His creative spirit and dedication to innovation have led to remarkable contributions in the field of technology.

Latest Patents: Katsuhiro Takenaga holds several patents in the areas of robotics, artificial intelligence, and renewable energy technologies. His recent patents focus on enhancing efficiency and sustainability in various industries.

Career Highlights: With a background in engineering and a passion for problem-solving, Katsuhiro Takenaga has had a distinguished career marked by groundbreaking inventions. His work has revolutionized processes in manufacturing, healthcare, and environmental conservation.

Collaborations: Throughout his career, Katsuhiro Takenaga has collaborated with leading research institutions, universities, and tech companies to bring his inventions to life. His partnerships have been instrumental in pushing the boundaries of technological advancement.

Conclusion: In conclusion, Katsuhiro Takenaga stands as a visionary inventor whose relentless pursuit of innovation continues to inspire the next generation of inventors. His impact on various industries is a testament to the power of creativity and ingenuity in shaping a better future.

Profile summary based on public USPTO records.
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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