Tokyo, Japan

Katsumi Anai

This inventor holds 3 USPTO granted patents. Top assignee: Mitsubishi Rayon Company, Limited. Active years: 1987-2005.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Katsumi Anai. Retrieved from https://idiyas.com/inventor/katsumi-anai

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


% Patents Active = 100.0

Average Co-Inventor Count = 3.0

ph-index = 3

Forward Citations = 23(Granted Patents)


Location History:

  • Hiroshima, JP (1987)
  • Tokyo, JP (2004 - 2005)

Company Filing History:


Years Active: 1987-2005

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3 patents (USPTO):Explore Patents

Title: Innovations of Katsumi Anai in Golf Club Technology

Introduction

Katsumi Anai is a notable inventor based in Tokyo, Japan. He has made significant contributions to the field of sports equipment, particularly in the design of golf club shafts. With a total of 3 patents to his name, Anai's work focuses on enhancing the performance and usability of golf clubs.

Latest Patents

One of Anai's latest patents is for a shaft designed for light-weight golf clubs. This innovative shaft is 35-50 percent lighter than conventional shafts while maintaining the same outer diameter and structural characteristics. The design incorporates at least four layers of fiber-reinforced material, arranged from innermost to outermost as follows: a first angled layer, a first straight layer, a second angled layer, and a second straight layer. The angled layers are created by bonding two materials with fibers aligned in different directions. The second angled layer is crucial for maintaining the strength and rigidity of the shaft while ensuring it remains lightweight. By aligning the fibers of this layer at an angle of 35-75 degrees with respect to the shaft's longitudinal direction, Anai ensures optimal weight and strength characteristics. The resulting shaft not only achieves a lightweight design but also exhibits the flexural rigidity, flexural strength, torsional rigidity, torsional strength, and crushing strength comparable to conventional shafts.

Career Highlights

Katsumi Anai is associated with Mitsubishi Rayon Company, Limited, where he continues to innovate in the field of sports equipment. His work has garnered attention for its practical applications and advancements in golf technology.

Collaborations

Anai has collaborated with notable coworkers such as Tetsuya Atsumi and Ikuo Takiguchi. Their combined expertise contributes to the innovative projects at Mitsubishi Rayon Company.

Conclusion

Katsumi Anai's contributions to the design of lightweight golf club shafts exemplify the intersection of innovation and sports technology. His patents reflect a commitment to enhancing athletic performance through advanced materials and engineering.

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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