Kitakyushu, Japan

Hirotada Katoh

This inventor holds 2 USPTO granted patents. Top assignee: Nippon Steel Corporation. Active years: 1976-1981.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hirotada Katoh. Retrieved from https://idiyas.com/inventor/hirotada-katoh

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 = 2

Forward Citations = 16(Granted Patents)


Location History:

  • Kitakyushu, JA (1976)
  • Kitakyushu, JP (1981)

Company Filing History:


Years Active: 1976-1981

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2 patents (USPTO):Explore Patents

Title: The Innovations of Hirotada Katoh

Introduction

Hirotada Katoh is a prominent inventor based in Kitakyushu, Japan. He has made significant contributions to the field of electrical engineering, particularly in the development of insulating coatings for electrical steel sheets. With a total of 2 patents, his work has had a notable impact on the industry.

Latest Patents

One of his latest patents is focused on insulating coating compositions applied on electrical steel sheets. This innovative coating composition includes inorganic compounds dispersed in an organic material. Upon exposure to UV rays or electron beams, it produces an adherent insulating film with high dielectric properties on the surfaces of electro-sheets made from ferrous material. The coated electro-sheets undergo annealing after forming operations, such as cutting or punching, to remove imparted stresses without compromising the dielectric properties.

Another significant patent is the annealing separator for heat treatment of silicon steel sheets. This separator comprises not more than 0.2% SO₃ and not more than 0.04% Cl, with the balance being MgO and unavoidable impurities. It has a bulk density between 0.18 and 0.30 g/cm³ and a specific particle size distribution, ensuring optimal performance during the heat treatment process.

Career Highlights

Hirotada Katoh is associated with Nippon Steel Corporation, where he has been instrumental in advancing technologies related to electrical steel sheets. His expertise and innovative approach have contributed to the company's reputation as a leader in the steel industry.

Collaborations

Throughout his career, Katoh has collaborated with notable colleagues, including Toshiya Wada and Takaaki Yamamoto. These partnerships have fostered a collaborative environment that encourages innovation and the sharing of ideas.

Conclusion

Hirotada Katoh's contributions to the field of electrical engineering through his patents and collaborations highlight his role as a key innovator. His work continues to influence the industry, showcasing the importance of innovation in advancing technology.

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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