This inventor holds 114 USPTO granted patents and 8 published patent applications and 26 EPO patents, primarily in High-Strength Steel (CPC class C22C38-02). Top assignees: Jfe Steel Corporation, Nippon Kogaku K.k., Nec Corporation. Active years: 1976-2026.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Inventors with similar research interests:
Location History:
- Kawasaki, JA (1976)
- Tokyo, JA (1978)
- Urawa, JP (1984 - 1988)
- Machida, JP (2010 - 2012)
- Chiyoda-ku, JP (2015)
- Hiroshima, JP (2017 - 2018)
- Fukuyama, JP (2016 - 2020)
- Tokyo, JP (1978 - 2023)
Company Filing History:
42 out of 1,962 
28 out of 849 
9 out of 36,684 
Years Active: 1976-2026
Areas of Expertise:
Title: The Innovations of Hiroshi Hasegawa: A Pioneer in High-Strength Steel Technologies
Introduction
Hiroshi Hasegawa, based in Tokyo, Japan, is a renowned inventor with an impressive portfolio of 84 patents. His work primarily focuses on advancements in the field of steel manufacturing, particularly high-strength hot-dip galvanized steel sheets. His innovations have significantly contributed to the industries that rely on durable and resilient materials.
Latest Patents
One of Hasegawa's latest patents is titled "High-strength hot-dip galvanized steel sheet and method for producing the same." This invention describes a high-strength galvanized steel sheet that features a specific composition and microstructure, comprising 90% to 100% of martensite and carbide-containing bainite. Notably, it contains 0% to 10% of retained austenite, and the prior austenite grains present have an aspect ratio of 2.0 or less. The patent outlines the critical ratios of carbon concentration within specific distances from the surface layer, emphasizing the meticulous engineering that went into developing this advanced material.
Another significant patent by Hasegawa is similarly focused on "High-strength hot-dip galvanized steel sheet and method for manufacturing the same." This invention illustrates a specific chemical composition and steel microstructure, where the total area fraction of martensite and bainite containing carbides ranges from 60% to 100%. Additionally, it outlines an average grain size of prior austenite that is 15 μm or less and discusses the necessary ratios of phosphorus concentration, showcasing the intricate details that define the steel's properties.
Career Highlights
Hasegawa has had a distinguished career, working with notable companies such as Nippon Kogaku Co., Ltd. and JFE Steel Corporation. His experiences in these reputable organizations have allowed him to refine his skills and further his knowledge in steel technology, paving the way for his numerous inventions.
Collaborations
Throughout his career, Hiroshi Hasegawa has collaborated with esteemed colleagues like Tatsuya Nakagaito and Yoshimasa Funakawa. These partnerships have fostered a creative environment where innovative ideas can thrive, contributing to groundbreaking developments in the field of steel production.
Conclusion
Hiroshi Hasegawa's contributions to the invention of high-strength hot-dip galvanized steel sheets showcase his expertise and commitment to advancing material science. With a robust portfolio of patents and a career marked by significant collaborations, Hasegawa continues to be a trailblazer in the steel manufacturing industry, influencing the future of durable materials.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile