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For the Inventor, By the Inventor

Higashimatsuyama, Japan

Kunio Yanagi

This inventor holds 8 USPTO granted patents. Top assignee: Jidosha Kiki Co., Ltd.. Active years: 1984-1996.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kunio Yanagi. Retrieved from https://idiyas.com/inventor/kunio-yanagi

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

Calculating rank
USPTO Granted Patents = 8

% Patents Active = 100.0

Average Co-Inventor Count = 1.8

ph-index = 5

Forward Citations = 54(Granted Patents)


Location History:

  • Saitama, JP (1994)
  • Higashimatsuyama, JP (1984 - 1996)

Company Filing History:

goldMedal8 out of 376 
 
Jidosha Kiki Co., Ltd.
 patents

Years Active: 1984-1996

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8 patents (USPTO):Explore Patents
1. 5560206 - Master cylinder with return spring (1996-10-01),
2. 5493863 - Reservoir for master cylinder (1996-02-27),
3. 5349820 - Inlet union for master cylinder (1994-09-27),
4. 5347813 - Cap for master cylinder reservoir (1994-09-20),
5. 5152419 - Cap for reserve tanks (1992-10-06),
6. 5066072 - Hydraulic brake pressure control valve (1991-11-19),
7. 4558798 - Fluid reservoir having a seal and cover (1985-12-17),
8. 4482160 - Waterproof seal ring for power brake booster housing (1984-11-13),

Title: Kunio Yanagi: Innovator in Master Cylinder Technology

Introduction

Kunio Yanagi is a notable inventor based in Higashimatsuyama, Japan. He has made significant contributions to the field of engineering, particularly in the design and functionality of master cylinders. With a total of 8 patents to his name, Yanagi's work reflects a commitment to innovation and improvement in mechanical systems.

Latest Patents

Among his latest patents, Yanagi has developed a master cylinder with a return spring. The objective of this invention is to prevent the buckling of the spring while ensuring that the packing remains undamaged. This design features a return spring that includes a cylindrical large-diameter coil portion, which is nearly in contact with the inner peripheral wall of the cylinder, and a small-diameter coil portion that is significantly smaller in diameter. The installation length of the small-diameter coil portion is carefully set to match the range in which the packing slides. Another significant patent is for a reservoir for the master cylinder, which includes an arc-shaped flange that protrudes on the peripheral surface at the top end of a filter. This design incorporates guide ribs that facilitate the proper positioning of the filter within the tank body.

Career Highlights

Yanagi has worked with Jidosha Kiki Co., Ltd., a company known for its advancements in automotive technology. His experience in this company has allowed him to refine his skills and contribute to innovative projects that enhance vehicle performance and safety.

Collaborations

Throughout his career, Yanagi has collaborated with talented individuals such as Toshiaki Satoh and Akihiro Kamiyoshihara. These collaborations have fostered a creative environment that has led to the development of groundbreaking technologies.

Conclusion

Kunio Yanagi's contributions to the field of master cylinder technology exemplify his dedication to innovation and engineering excellence. His patents not only reflect his technical expertise but also his commitment to improving mechanical systems for better performance and reliability.

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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