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For the Inventor, By the Inventor

Tokai, Japan

Toshiro Yamamoto

This inventor holds 5 USPTO granted patents. Top assignees: Aichi Steel Works, Ltd., Chuo Hatsujo Kabushiki Kaisha. Active years: 1984-1988.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Toshiro Yamamoto. Retrieved from https://idiyas.com/inventor/toshiro-yamamoto-pm50vfmx

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

USPTO Granted Patents = 5

% Patents Active = 100.0

Average Co-Inventor Count = 4.0

ph-index = 5

Forward Citations = 43(Granted Patents)


Location History:

  • Aichi, JP (1986)
  • Tokai, JP (1984 - 1988)

Company Filing History:

goldMedal5 out of 58 
 
Aichi Steel Works, Ltd.
 patents
silverMedal5 out of 102 
 
Chuo Hatsujo Kabushiki Kaisha
 patents
where one patent can have more than one assignee

Years Active: 1984-1988

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5 patents (USPTO):Explore Patents
1. 4770721 - Process of treating steel for a vehicle suspension spring to improve (1988-09-13),
2. 4711675 - Process for improving the sag-resistance and hardenability of a spring (1987-12-08),
3. 4574016 - Method of treating steel for a vehicle suspension spring having a good (1986-03-04),
4. 4544406 - Spring steel having a good sag-resistance and a good hardenability (1985-10-01),
5. 4448617 - Steel for a vehicle suspension spring having good sag-resistance (1984-05-15),

Title: Toshiro Yamamoto: Innovator in Spring Steel Technology

Introduction

Toshiro Yamamoto is a notable inventor based in Tokai, Japan. He has made significant contributions to the field of materials science, particularly in the development of advanced spring steels. With a total of five patents to his name, his work has had a considerable impact on the automotive industry.

Latest Patents

Yamamoto's latest patents focus on processes for treating steel to enhance its properties for vehicle suspension springs. One of his patents describes a spring steel composition that includes 0.5-0.8% carbon, 0.5-1.4% silicon, and 0.5-1.5% manganese, along with optional elements such as vanadium, niobium, and molybdenum. This composition aims to improve sag-resistance, making it ideal for automotive applications. Another patent outlines a process for improving both sag-resistance and hardenability, featuring a similar composition but with variations in silicon and manganese content.

Career Highlights

Throughout his career, Toshiro Yamamoto has worked with prominent companies in the steel industry, including Aichi Steel Works, Ltd. and Chuo Hatsujo Kabushiki Kaisha. His expertise in metallurgy and material properties has positioned him as a key figure in the development of high-performance steel products.

Collaborations

Yamamoto has collaborated with several talented individuals in his field, including Ryohei Kobayashi and Mamoru Kurimoto. These partnerships have fostered innovation and have contributed to the advancement of spring steel technology.

Conclusion

Toshiro Yamamoto's contributions to the field of spring steel technology demonstrate his commitment to innovation and excellence. His patents reflect a deep understanding of material properties and their applications in the automotive industry.

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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