Hitoshi Nakatsuka

This inventor holds 15 USPTO granted patents and 3 published patent applications, plus 1 CIPO patent and 12 EPO patents, primarily in Composite Fiber Technology. Top assignees: Kuraray Co., Ltd., Funai Electric Company Ltd., Kuraray Fastening Co., Ltd.. Active years: 2002-2025.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hitoshi Nakatsuka. Retrieved from https://idiyas.com/inventor/hitoshi-nakatsuka

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

Calculating rank

USPTO Granted Patents = 15 (Patent Applications = 3)

% Patents Active = 86.7

CIPO Patents = 1

EPO Patents = 12 (Patent Applications = 8)

Average Co-Inventor Count = 3.4

ph-index = 6

Forward Citations = 182(Granted Patents)

Location History:

Okayama-Pref., JP (2002 - 2003)
Okayama, JP (2004)
Osaka, JP (2010 - 2013)
Kurashiki, JP (2003 - 2022)

Company Filing History:

Funai Electric Company Ltd.

patents

1 out of 29

Kuraray Fastening Co., Ltd.

patents

Years Active: 2002-2025

Loading Chart...

Areas of Expertise:

Composite Fiber

Artificial Leather

Napped Fiber

Cationic Dye

Polyester Fiber

Conductive Fiber

Hollow Fiber

Manufacturing Process

Thermoplastic Fiber

Fabric Fastener

Liquid Crystal Display

Dyeability

15 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 12338552 - Composite fiber (2025-06-24),

2. 12104317 - Artificial leather base material, method for production thereof, and napped artificial leather (2024-10-01),

3. 11473218 - Modified ethylene-vinyl alcohol copolymer fibers (2022-10-18),

4. 11339530 - Napped artificial leather, polyester fiber, and non-woven fabric (2022-05-24),

5. 10982382 - Napped artificial leather dyed with cationic dye, and method for manufacturing the same (2021-04-20),

6. 9752258 - Cationic-dyeable polyester fiber and conjugated fiber (2017-09-05),

7. 8537083 - Method for controlling common voltage of the liquid crystal display device (2013-09-17),

8. 8039083 - Hook-and-loop fastener made of fabric (2011-10-18),

9. 7824769 - Conductive sheath-core conjugate fiber and process for producing the same (2010-11-02),

10. 7767298 - Electrically conductive composite fiber and process for producing the same (2010-08-03),

11. 6811874 - Composite fiber (2004-11-02),

12. 6635204 - Process of making hollow fibers and treating fibers (2003-10-21),

13. 6552123 - Thermoplastic polyvinyl alcohol fibers and method for producing them (2003-04-22),

14. 6537660 - Light-weight fiber excellent in dyeability (2003-03-25),

15. 6455156 - Hollow fibers and manufacturing method of hollow fibers (2002-09-24),

Title: Innovative Contributions of Hitoshi Nakatsuka

Introduction: Hitoshi Nakatsuka, an accomplished inventor based in Kurashiki, Japan, has made significant strides in the field of materials science. With a portfolio that boasts 15 patents, his work has contributed to advancements in composite fibers and artificial leather technologies.

Latest Patents: Among his recent innovations, Nakatsuka has developed a composite fiber designed to achieve a strength of 0.04 cN/dtex or less at 100% elongation. This innovation holds great potential in various applications within the textile industry. Another notable invention is an artificial leather base material which includes a non-woven fabric comprised of intertwined crimped fibers and elastic polymers, thus enhancing the durability and functionality of artificial leather products.

Career Highlights: Throughout his career, Nakatsuka has been associated with reputable companies, notably Kuraray Co., Ltd. and Kuraray Fastening Co., Ltd.. His experiences in these organizations have allowed him to refine his expertise in material development and innovation.

Collaborations: Nakatsuka has worked alongside notable colleagues such as Kazuhiko Tanaka and Nobuhiro Koga, contributing to a collaborative environment that fosters creativity and progress in their respective fields.

Conclusion: Hitoshi Nakatsuka's contributions to innovations in composite fibers and artificial leather materials underline his importance as an inventor. His extensive patent portfolio and collaborative efforts within the industry serve as a testament to his commitment to advancing material science and technology.

Profile summary based on public USPTO records.