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For the Inventor, By the Inventor

Hiroshima, Japan

Masaaki Maekawa

This inventor holds 11 USPTO granted patents. Top assignee: Toda Kogyo Corporation. Active years: 1992-2007.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masaaki Maekawa. Retrieved from https://idiyas.com/inventor/masaaki-maekawa

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

USPTO Granted Patents = 11

% Patents Active = 54.5

Average Co-Inventor Count = 3.6

ph-index = 4

Forward Citations = 43(Granted Patents)


Location History:

  • Onoda, JP (2001 - 2002)
  • Hiroshima, JP (1992 - 2007)

Company Filing History:

goldMedal11 out of 390 
 
Toda Kogyo Corporation
 patents

Years Active: 1992-2007

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11 patents (USPTO):Explore Patents
1. 7172642 - Magnetic metal particles containing iron as main component, process for producing the same and magnetic recording medium using the same (2007-02-06),
2. 6916530 - Perpendicular magnetic recording medium (2005-07-12),
3. 6821618 - Magnetic recording medium and process for producing the same (2004-11-23),
4. 6753084 - Spindle-shaped magnetic alloy particles for magnetic recording, and magnetic recording medium (2004-06-22),
5. 6398863 - Spindle-shaped hematite particles and process for making spindle-shaped hematite particles (2002-06-04),
6. 6309479 - Spindle-shaped goethite particles, spindle-shaped hematite particles and magnetic spindle-shaped metal particles containing iron as main component (2001-10-30),
7. 5882795 - Non-magnetic coated particles having a defined parameter .alpha. of not (1999-03-16),
8. 5830557 - Non-magnetic undercoating layer for magnetic recording medium, magnetic (1998-11-03),
9. 5604015 - Non-magnetic undercoat layer for magnetic recording medium, magnetic (1997-02-18),
10. 5118575 - Plate-like composite ferrite fine particles for magnetic recording and a (1992-06-02),
11. 5079092 - Plate-like composite ferrite fine particles suitable for use in magnetic (1992-01-07),

Title: **Masaaki Maekawa: Innovator in Magnetic Materials**

Introduction

Masaaki Maekawa, a distinguished inventor based in Hiroshima, Japan, has made significant contributions to the field of magnetic materials. With an impressive portfolio of 11 patents, Maekawa's innovations focus on enhancing the performance and efficiency of magnetic recording media.

Latest Patents

Among Masaaki Maekawa's notable inventions are his recent patents related to magnetic metal particles and perpendicular magnetic recording mediums. His first patent details a composition of magnetic metal particles containing iron as the main component, enriched with cobalt, aluminum, and rare earth elements. This innovative combination results in particles with specific dimensions, coercive force, and minimal soluble content, primarily aimed at improving magnetic properties and oxidation stability.

Another groundbreaking patent pertains to a perpendicular magnetic recording medium that includes a substrate, a soft-magnetic layer, an orientation control oxide layer, and a magnetic recording layer comprising a maghemite thin film. This configuration is designed to deliver excellent magnetic properties, high recording resolution, and enhanced surface characteristics, paving the way for advancements in magnetic recording technology.

Career Highlights

Masaaki Maekawa is associated with Toda Kogyo Corporation, a company renowned for its expertise in developing cutting-edge magnetic materials. Under his tenure, the focus has been on research and development that bridges the gap between theoretical advancements and practical applications in the field of magnetics.

Collaborations

Throughout his career, Maekawa has collaborated with notable colleagues such as Norio Sugita and Kenji Okinaka. Together, they have fostered a dynamic research environment that encourages the sharing of ideas and further innovation in magnetic technologies, contributing to the overall growth of the industry.

Conclusion

In conclusion, Masaaki Maekawa exemplifies the innovative spirit within the realm of magnetic materials. His substantial patent portfolio, collaboration with esteemed colleagues, and commitment to advancing magnetic technology showcase his valued role in shaping the future of the industry. As technology continues to evolve, Maekawa's contributions will undoubtedly leave a lasting impact.

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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