Tokyo, Japan

Ryoji Nakagawa

This inventor holds 5 USPTO granted patents and 1 published patent application. Top assignee: Hitachi, Ltd.. Active years: 2015-2024.

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

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 = 60.0

Average Co-Inventor Count = 4.3

ph-index = 1

Forward Citations = 9(Granted Patents)


Location History:

  • Hitachi, JP (2015)
  • Tokyo, JP (2015 - 2024)

Company Filing History:


Years Active: 2015-2024

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5 patents (USPTO):Explore Patents

Title: Ryoji Nakagawa: Innovations in Welding Technology

Introduction

Ryoji Nakagawa is a distinguished inventor based in Tokyo, Japan, recognized for his significant contributions to welding technology. With an impressive portfolio comprising five patents, he has become a prominent figure in the field of innovation, particularly through his work at Hitachi, Ltd.

Latest Patents

Nakagawa's latest patents showcase his expertise in developing advanced welding management systems. One of his notable inventions is the "Welding Management System," which efficiently manages the welding process using a combination of local magnetic sensors and a correction magnetic sensor. This technology generates detailed information about the joining state at the target position, enhancing the quality and precision of welds.

Additionally, he has patented a "Welding Monitoring System and Welding Monitoring Method," which provides a multidimensional approach to monitoring welding portions with exceptional accuracy. This system features a mechanical component including a transport arm and subject holding portion, alongside imaging means to capture and analyze welding data. The monitoring method calculates the presence of abnormalities by comparing extracted characteristics against predetermined standard characteristics, ensuring high reliability in weld quality assessment.

Career Highlights

Throughout his career at Hitachi, Ltd., Nakagawa has consistently driven innovation in welding technology. His work has not only improved existing processes but also paved the way for new methodologies in the industry. He stands out as a crucial contributor to the development of high-performance welding systems that meet the demands of modern applications.

Collaborations

Ryoji Nakagawa has collaborated with several esteemed colleagues, including Hisashi Endou and Hiroshi Yoshikawa. Together, they have worked on various projects aimed at enhancing welding efficiency and effectiveness, leveraging their collective expertise to bring forward groundbreaking solutions.

Conclusion

Ryoji Nakagawa’s contributions to welding technology through his innovative patents exemplify the impact of dedicated inventors in advancing industrial practices. His work at Hitachi, Ltd. and collaboration with fellow inventors underscore the importance of innovation in driving progress within the field. As he continues to evolve his research, Nakagawa remains a pivotal figure in the world of welding 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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