Akigawa, Japan

Ryoichi Nakatani

This inventor holds 33 USPTO granted patents and 2 EPO patents, primarily in Magnetic Memory Technology. Top assignees: Hitachi, Ltd., Osaka University, Hitachi Global Storage Technologies Japan, Ltd.. Active years: 1989-2016.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Ryoichi Nakatani. Retrieved from https://idiyas.com/inventor/ryoichi-nakatani

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


% Patents Active = 63.6


Average Co-Inventor Count = 3.3

ph-index = 12

Forward Citations = 385(Granted Patents)


Location History:

  • Akikawa, JP (1989 - 1999)
  • Akiruno, JP (2002)
  • Urawa, JP (2001 - 2003)
  • Toyonaka, JP (2002 - 2006)
  • Akigawa, JP (1990 - 2007)
  • Suita, JP (2016)

Company Filing History:


Years Active: 1989-2016

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Areas of Expertise:
Magnetic Memory
Tunneling Magnetoresistive Element
Magnetic Head
Magnetic Recording
Magnetoresistance Effect
Multilayer Film
Ferromagnetic Film
Magnetic Device
Magnetic Array
Vortex Magnetization
Corrosion Resistance
Magnetic Flux Density
33 patents (USPTO):Explore Patents

Title: **Innovative Contributions of Ryoichi Nakatani**

Introduction

Ryoichi Nakatani, located in Akigawa, Japan, is a notable inventor with an impressive portfolio of 33 patents. His work primarily focuses on advancements in magnetic field measurement and recording technologies. Through his innovations, he has greatly contributed to the fields of physics and engineering.

Latest Patents

Among his latest inventions, Nakatani has developed a **Magnetic Field Value Measuring Device and Method for Measuring Magnetic Field Value**. This device incorporates a vibrational probe unit that uses materials whose magnetization intensity is proportional to external magnetic fields. The device includes components such as a mechanical vibration source, a vibration detector, and both alternating-current and direct-current magnetic field generators, allowing for precise measurement and adjustment of magnetic fields originating from specimens.

Another significant patent is the **Magnetic Apparatus with Perpendicular Recording Medium and Head Having Multilayered Reproducing Element Using Tunneling Effect**. This innovation features a multilayered magnetoresistance effect element designed to detect extremely narrow magnetic fields from high-density recorded media. The structure significantly reduces the area of magnetic layers facing the recording surface, enhancing the effectiveness of magnetic detection through current flowing in the intermediate layer.

Career Highlights

Nakatani has had a distinguished career, working with prominent organizations such as Hitachi, Ltd. and Osaka University. His experience in these esteemed institutions has allowed him to pursue cutting-edge research and development in magnetic technologies. His dedication to innovation has not only advanced theoretical understanding but has also led to practical applications in the industry.

Collaborations

Throughout his career, Ryoichi Nakatani has collaborated with esteemed colleagues, including Toshio Kobayashi and Masahiro Kitada. These partnerships have fostered a dynamic environment for exchange of ideas and facilitated advancements in their shared research interests, further enhancing the impact of their collective work on the scientific community.

Conclusion

Ryoichi Nakatani’s contributions to the field of magnetic measurement and technology underscore his role as an influential inventor. His 33 patents reflect a commitment to innovation, advancing both theoretical and practical applications of magnetic fields. As he continues to explore new frontiers within his research, the potential for future breakthroughs remains vast, positioning him as a significant figure in the realm of engineering and 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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