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For the Inventor, By the Inventor

Tokyo, Japan

Asuka Namai

This inventor holds 16 USPTO granted patents and 9 published patent applications and 6 EPO patents, primarily in Magnetic Materials. Top assignees: The University of Tokyo, Dowa Electronics Materials Co., Ltd., Tokyo Ohka Kogyo Co., Ltd.. Active years: 2011-2025.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Asuka Namai. Retrieved from https://idiyas.com/inventor/asuka-namai

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

Calculating rank
USPTO Granted Patents = 16 

% Patents Active = 62.5

 

Average Co-Inventor Count = 5.3

ph-index = 2

Forward Citations = 21(Granted Patents)


Location History:

  • Tsukuba, JP (2011)
  • Tokyo, JP (2016 - 2024)

Company Filing History:

goldMedal16 out of 1,363 
 
The University of Tokyo
 patents
silverMedal10 out of 315 
 
Dowa Electronics Materials Co., Ltd.
 patents
bronzeMedal3 out of 1,236 
 
Tokyo Ohka Kogyo Co., Ltd.
 patents
4. 1 out of 31 
 
Dowa Holdings Co., Ltd.
 patents
5. 1 out of 17,024 
 
Fujifilm Corporation
 patents
6. 1 out of 1,048 
 
Osaka University
 patents
7. 1 out of 372 
 
Panasonic Holdings Corporation
 patents
where one patent can have more than one assignee

Years Active: 2011-2025

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Areas of Expertise:
Iron-Based Oxide
Magnetic Powder
Electromagnetic Wave Absorber
High-Frequency Antenna
Magnetic Recording Medium
Nanopowder
Film Forming Paste
Epsilon Iron Oxide
Coercive Force
Magnetic Thin Film
Radio Wave Absorber
Oriented Body
16 patents (USPTO):Explore Patents
1. 12428310 - Iron-based oxide magnetic powder and method for producing same (2025-09-30),
2. 11980013 - Radio wave-absorbing laminate film, production method therefor, and element including same (2024-05-07),
3. 11574652 - Recording device and recording method (2023-02-07),
4. 11539141 - Radio wave absorber (2022-12-27),
5. 11401170 - Iron based oxide magnetic powder and method for producing same (2022-08-02),
6. 11087792 - Oriented body, method for producing the same, device for producing the same, and magnetic recording medium (2021-08-10),
7. 10807880 - Epsilon iron oxide and method for producing the same, magnetic coating material and magnetic recording medium (2020-10-20),
8. 10669161 - Oriented body containing e-iron oxide, method for producing the same, and device for producing the same (2020-06-02),
9. 10374307 - High-frequency antenna element and high-frequency antenna module (2019-08-06),
10. 10099941 - Magnetic iron oxide nanopowder and process for producing the same (2018-10-16),
11. 9916922 - Iron oxide magnetic nanoparticle powder and method of producing the same, iron oxide magnetic nanoparticle thin film containing the iron oxide magnetic nanoparticle powder and method of producing the same (2018-03-13),
12. 9886978 - Process for production of magnetic thin film, magnetic thin film, and magnetic material (2018-02-06),
13. 9806427 - Electromagnetic wave absorber and film forming paste (2017-10-31),
14. 9633770 - Method for improving coercive force of epsilon-type iron oxide, and epsilon-type iron oxide (2017-04-25),
15. 9458026 - Method for improving coercive force of epsilon-type iron oxide, and epsilon-type iron oxide (2016-10-04),

Title: Asuka Namai: Innovator in Magnetic Materials and Radio Wave Absorption

Introduction

Asuka Namai is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the fields of magnetic materials and radio wave absorption technologies. With a total of 16 patents to his name, Namai's work is recognized for its innovative approaches and practical applications.

Latest Patents

Namai's latest patents include groundbreaking inventions such as an iron-based oxide magnetic powder and a method for producing the same. This invention involves a raw material solution containing trivalent iron ions, which is treated to create particles of ε-iron oxide suitable for magnetic recording mediums. Another notable patent is for a radio wave-absorbing laminate film, which exhibits superior transmission and reflection attenuation properties in extremely high-frequency wave bands. This film is designed to be thin yet effective, making it a valuable asset in modern technology.

Career Highlights

Throughout his career, Asuka Namai has worked with esteemed organizations, including the University of Tokyo and Dowa Electronics Materials Co., Ltd. His experience in these institutions has allowed him to develop and refine his innovative ideas, contributing to advancements in material science.

Collaborations

Namai has collaborated with notable colleagues such as Shin-ichi Ohkoshi and Marie Yoshikiyo. These partnerships have fostered a creative environment that has led to the development of cutting-edge technologies in their respective fields.

Conclusion

Asuka Namai's contributions to the fields of magnetic materials and radio wave absorption are noteworthy. His innovative patents and collaborations highlight his role as a leading inventor in Japan. His work continues to influence advancements in technology and material science.

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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