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For the Inventor, By the Inventor

Kobe, Japan

Akira Kajikawa

This inventor holds 11 USPTO granted patents. Top assignee: Sumitomo Rubber Industries Limited. Active years: 1991-1995.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Akira Kajikawa. Retrieved from https://idiyas.com/inventor/akira-kajikawa

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

Calculating rank
USPTO Granted Patents = 11

% Patents Active = 100.0

Average Co-Inventor Count = 2.9

ph-index = 7

Forward Citations = 165(Granted Patents)


Company Filing History:

goldMedal11 out of 4,554 
 
Sumitomo Rubber Industries Limited
 patents

Years Active: 1991-1995

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11 patents (USPTO):Explore Patents
1. 5445203 - Radial tire with even wear at tread shoulders (1995-08-29),
2. 5360044 - Pneumatic radial tire with high cornering and steering stability (1994-11-01),
3. 5323826 - Pneumatic radial tire with high cornering and steering stability (1994-06-28),
4. 5309966 - Pneumatic radial tire with high cornering and steering stability (1994-05-10),
5. 5299612 - Pneumatic radial tire with high cornering and steering stability (1994-04-05),
6. 5277235 - Pneumatic radial tire with high cornering and steering stability (1994-01-11),
7. 5222537 - Stability pneumatic radial tire with high cornering and steering (1993-06-29),
8. 5092166 - Apparatus for determining shape of contact patch and contact pressure of (1992-03-03),
9. 5088321 - Apparatus and method for observing the ground contact patch of a tire (1992-02-18),
10. 5058646 - Pneumatic safety tire (1991-10-22),
11. 5031680 - Pneumatic radial tire tread with rectangular blocks having side grooves (1991-07-16),

Title: Akira Kajikawa: Tire Design Inventor

Introduction

Akira Kajikawa is an inventor associated with Kobe, Japan, and Sumitomo Rubber Industries Limited. Her work includes tire designs intended to improve tread wear, cornering performance, and steering stability. The supplied information credits her with 11 patents.

Latest Patents

Two of Kajikawa’s listed patents focus on pneumatic radial tire design.

“Radial Tire with Even Wear at Tread Shoulders” describes a belted radial tire with a carcass, bead cores, and multiple cross plies. It specifies a relationship among the effective belt width, belt-edge camber height, and tire section width, with the aim of promoting even wear at the tread shoulders.

“Pneumatic Radial Tire with High Cornering and Steering Stability” describes a tread profile formed from arcs with specified curvature relationships. The design also uses a circumferential groove near the transition between the crown and shoulder regions, along with narrow lateral grooves that divide those regions into blocks. These features are intended to support cornering and steering stability.

Career Highlights

Kajikawa’s listed inventions address practical aspects of tire performance, including tread wear and vehicle handling. Her work at Sumitomo Rubber Industries Limited connects her inventive activity with the company’s tire-development efforts.

Collaborations

The supplied information names Kenji Saito and Kazuo Asano as Kajikawa’s coworkers. It does not specify particular joint patents or projects involving them.

Conclusion

Akira Kajikawa’s listed patent work centers on radial tire structures and tread profiles designed to improve wear characteristics, cornering, and steering stability.

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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