Yokohama, Japan

Takuji Nagashima

This inventor holds 15 USPTO granted patents and 11 published patent applications and 5 EPO patents. Top assignee: Sumitomo Electric Industries, Limited. Active years: 2013-2023.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Takuji Nagashima. Retrieved from https://idiyas.com/inventor/takuji-nagashima

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

USPTO Granted Patents = 15 

% Patents Active = 86.7

 

Average Co-Inventor Count = 2.6

ph-index = 2

Forward Citations = 9(Granted Patents)


Location History:

  • Yokohama, JP (2013 - 2020)
  • Osaka, JP (2019 - 2023)

Company Filing History:


Years Active: 2013-2023

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15 patents (USPTO):Explore Patents

Title: **Innovator Spotlight: Takuji Nagashima**

Introduction

Takuji Nagashima, hailing from Yokohama, Japan, is a prominent inventor specializing in advancements in optical fiber technology. With 15 patents to his name, his contributions have significantly influenced the field of telecommunications through innovative manufacturing methods and optical fiber structures.

Latest Patents

Among his latest patents are a "Manufacturing Method for Preform of Multi-Core Fiber" and a "Manufacturing Method for Multi-Core Fiber." The manufacturing method involves creating one or more first holes in a cladding rod, where a first glass rod is then inserted. The cladding rod is subsequently heated to integrate the two, forming an intermediate preform. Following this, second holes are created, and additional glass rods are inserted, culminating in a comprehensive manufacturing process. Furthermore, his advancements in multi-core optical fiber (MCF) focus on preventing deterioration in optical transmission signal quality, featuring cores, a common cladding, and a specialized coating to minimize leakage loss and ensure optimal performance over a range of wavelengths.

Career Highlights

Takuji Nagashima's contributions are closely associated with his role at Sumitomo Electric Industries, Limited. His innovative methods have not only paved the way for enhanced optical fibers but have also contributed to the company's reputation as a leader in electric and optical solutions. Working diligently on complex challenges, Nagashima stands out as a leading figure in the burgeoning field of optical telecommunications.

Collaborations

Throughout his career, Nagashima has collaborated with notable colleagues such as Tetsuya Nakanishi and Toshiki Taru. These partnerships have fostered a creative environment conducive to pioneering breakthroughs in fiber technology, emphasizing teamwork and shared vision in driving innovation.

Conclusion

Takuji Nagashima’s remarkable achievements and patents reflect his dedication to technological advancement in the field of optical fibers. As he continues to innovate, his work not only benefits the telecommunications industry but also inspires future inventors and researchers to explore the possibilities within this vital domain.

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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