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For the Inventor, By the Inventor

Kurashiki, Japan

Kiyoshi Hirakawa

This inventor holds 13 USPTO granted patents. Top assignees: Kuraray Co., Ltd., Yunitika Ltd.. Active years: 1985-2003.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kiyoshi Hirakawa. Retrieved from https://idiyas.com/inventor/kiyoshi-hirakawa

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

USPTO Granted Patents = 13

% Patents Active = 100.0

Average Co-Inventor Count = 5.8

ph-index = 8

Forward Citations = 145(Granted Patents)


Location History:

  • Okayama-Pref., JP (2002)
  • Kurashiki, JP (1985 - 2003)

Company Filing History:

goldMedal13 out of 1,872 
 
Kuraray Co., Ltd.
 patents
silverMedal1 out of 1 
 
Yunitika Ltd.
 patent
where one patent can have more than one assignee

Years Active: 1985-2003

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13 patents (USPTO):Explore Patents
1. 6635204 - Process of making hollow fibers and treating fibers (2003-10-21),
2. 6455156 - Hollow fibers and manufacturing method of hollow fibers (2002-09-24),
3. 5766758 - Fiber of ethylene-vinyl alcohol copolymer and process for production (1998-06-16),
4. 5753367 - Disperse dye-dyeable regenerated cellulose fiber and textile products (1998-05-19),
5. 5695375 - Disperse dye-dyeable regenerated cellulose fiber and textile products (1997-12-09),
6. 5567796 - Polyester fiber (1996-10-22),
7. 5464695 - Composite fiber containing inorganic fine powder (1995-11-07),
8. 5340650 - Vinyl alcohol units-containing polymer composite fiber having resistance (1994-08-23),
9. 5304420 - Vinyl alcohol unit-containing polymer fibers having high moisture (1994-04-19),
10. 5087519 - Ethylene-vinyl alcohol copolymer composite fiber and production thereof (1992-02-11),
11. 5059482 - Composite fiber and process for producing the same (1991-10-22),
12. 5047448 - Antimicrobial-shaped article and a process for producing the same (1991-09-10),
13. 4514459 - Woven fabric having a velvety appearance (1985-04-30),

Title: Kiyoshi Hirakawa: Innovator in Fiber Technology

Introduction

Kiyoshi Hirakawa, an esteemed inventor based in Kurashiki, Japan, has made significant contributions to the field of fiber technology. With a remarkable portfolio of 13 patents, Hirakawa's innovations have had a profound impact on the manufacturing processes of hollow fibers. His dedication to research and development has established him as a prominent figure in the industry.

Latest Patents

Hirakawa's latest patents showcase his expertise and forward-thinking approach. Among these are the "Process of making hollow fibers and treating fibers" and the "Hollow fibers and manufacturing method of hollow fibers." These innovations highlight his commitment to enhancing the efficiency and effectiveness of fiber production.

Career Highlights

Throughout his career, Hirakawa has held positions at notable companies, including Kuraray Co., Ltd. and Yunitika Ltd. His work at these organizations has allowed him to refine his skills and contribute to groundbreaking advancements in fiber technology. His experience is marked by a continuous pursuit of excellence and innovation.

Collaborations

Hirakawa has collaborated with talented individuals such as Kazuhiko Tanaka and Masao Kawamoto. These partnerships have facilitated the exchange of ideas and expertise, driving further advancements in their field. Together, they have tackled complex challenges and paved the way for new developments in fiber manufacturing.

Conclusion

Kiyoshi Hirakawa's contributions to the field of fiber technology through his numerous patents and professional endeavors demonstrate his status as a leading inventor. His relentless pursuit of innovation continues to inspire others in the industry, shaping the future of fiber manufacturing with his groundbreaking techniques.

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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