Yamaguchi, Japan

Ryoji Hirota

This inventor holds 7 USPTO granted patents, plus 2 CIPO patents and 3 EPO patents. Top assignees: Nisshin Steel Co., Ltd., Nippon Steel Nisshin Co., Ltd.. Active years: 1993-2019.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Ryoji Hirota. Retrieved from https://idiyas.com/inventor/ryoji-hirota

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 = 3.9

ph-index = 3

Forward Citations = 15(Granted Patents)


Location History:

  • Shin-Nan'yo, JP (1993)
  • Nanyou, JP (2001)
  • Tokyo, JP (2003 - 2018)
  • Yamaguchi, JP (2018 - 2019)

Company Filing History:


Years Active: 1993-2019

Loading Chart...
Loading Chart...
Loading Chart...
7 patents (USPTO):Explore Patents

Title: Ryoji Hirota: Innovator in Stainless Steel Technology

Introduction

Ryoji Hirota is a prominent inventor based in Yamaguchi, Japan. He has made significant contributions to the field of materials science, particularly in the development of advanced stainless steel products. With a total of 7 patents to his name, Hirota's work has had a lasting impact on the industry.

Latest Patents

Hirota's latest patents include a martensitic stainless-steel sheet and a method for producing high elastic limit nonmagnetic steel material. The martensitic stainless-steel sheet features reduced anisotropy in workability and fatigue resistance, which are attributed to oxide-based inclusions. This innovative sheet has a specific steel composition that enhances its performance characteristics. The second patent addresses the production of a high-strength nonmagnetic austenitic stainless steel material, which boasts a high elastic limit stress and excellent toughness. This material is designed to meet the demands of various applications in the steel industry.

Career Highlights

Throughout his career, Ryoji Hirota has worked with notable companies such as Nisshin Steel Co., Ltd. and Nippon Steel Nisshin Co., Ltd. His experience in these organizations has allowed him to refine his expertise in steel technology and contribute to groundbreaking advancements in the field.

Collaborations

Hirota has collaborated with esteemed colleagues, including Hiroyasu Matsubayashi and Sadayuki Nakamura. These partnerships have fostered a creative environment that has led to innovative solutions in stainless steel development.

Conclusion

Ryoji Hirota's contributions to stainless steel technology exemplify the spirit of innovation in materials science. His patents and collaborations reflect a commitment to advancing the industry and improving product performance.

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]
Loading…