Okazaki, Japan

Yoshiyuki Hagiwara

This inventor holds 7 USPTO granted patents. Top assignees: Taiho Kogyo Co., Ltd., Toyota Jidosha Kabushiki Kaisha, Toyota Motor Corporation. Active years: 1986-1998.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yoshiyuki Hagiwara. Retrieved from https://idiyas.com/inventor/yoshiyuki-hagiwara

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

Calculating rank

% Patents Active = 100.0

Average Co-Inventor Count = 4.0

ph-index = 7

Forward Citations = 103(Granted Patents)


Location History:

  • Aichi, JP (1986)
  • Okazaki, JP (1994 - 1998)

Company Filing History:


Years Active: 1986-1998

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7 patents (USPTO):Explore Patents

Title: Innovations of Yoshiyuki Hagiwara

Introduction

Yoshiyuki Hagiwara is a notable inventor based in Okazaki, Japan. He has made significant contributions to the field of engineering, particularly in the development of metal gaskets. With a total of 7 patents to his name, Hagiwara's work has had a considerable impact on automotive and machinery applications.

Latest Patents

Hagiwara's latest patents include innovative designs for metal gaskets. One of his inventions, titled "Metal gasket with shim," focuses on sealing clearances between clamping members. This metal gasket features a metallic base plate with openings and an annular metallic shim welded around the opening. The design ensures that the nuggets formed by spot welding overlap, creating a secure seal.

Another significant patent is the "Metal gasket," which addresses the sealing of clearances between a cylinder head and a cylinder block in engines. This gasket is designed with a metallic base plate that includes multiple openings and beads. The arrangement allows for effective sealing while minimizing displacement relative to the cylinder head.

Career Highlights

Throughout his career, Hagiwara has worked with prominent companies such as Taiho Kogyo Co., Ltd. and Toyota Motor Corporation. His experience in these organizations has contributed to his expertise in gasket technology and engineering solutions.

Collaborations

Hagiwara has collaborated with notable colleagues, including Osamu Jinno and Yukio Kawai. These partnerships have fostered innovation and advancements in their respective fields.

Conclusion

Yoshiyuki Hagiwara's contributions to the field of engineering through his patents and collaborations highlight his role as a significant inventor. His work continues to influence the design and functionality of metal gaskets in various applications.

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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