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For the Inventor, By the Inventor

Yonago, Japan

Tsutomu Inui

This inventor holds 14 USPTO granted patents. Top assignees: Hitachi Metals, Ltd., Hitachi Metals, Ltd. and Denso Corporation, Nippondenso Co., Ltd.. Active years: 1990-2002.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Tsutomu Inui. Retrieved from https://idiyas.com/inventor/tsutomu-inui-wupnqpv1

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

USPTO Granted Patents = 14

% Patents Active = 100.0

Average Co-Inventor Count = 4.1

ph-index = 8

Forward Citations = 124(Granted Patents)


Location History:

  • Yanago, JP (1998)
  • Yonago, JP (1990 - 2002)

Company Filing History:

goldMedal10 out of 2,333 
 
Hitachi Metals, Ltd.
 patents
silverMedal1 out of 1 
 
Hitachi Metals, Ltd. and Denso Corporation
 patent
bronzeMedal1 out of 3,252 
 
Nippondenso Co., Ltd.
 patents
4. 3 out of 834,570 
Other
 patents
where one patent can have more than one assignee

Years Active: 1990-2002

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14 patents (USPTO):Explore Patents
1. 6390443 - Composite magnetic member, process for producing the member and electromagnetic valve using the member (2002-05-21),
2. 6255005 - Composite magnetic member, method of producing ferromagnetic portion of same, and method of forming non-magnetic portion of same (2001-07-03),
3. 6245441 - Composite magnetic member excellent in corrosion resistance and method of producing the same (2001-06-12),
4. 6187459 - Composite magnetic member, process for producing the member and electromagnetic valve using the member (2001-02-13),
5. 6001194 - Bias material, magnetic marker and method of producing the bias material (1999-12-14),
6. 5865907 - Composite magnetic member, process for producing the member and (1999-02-02),
7. 5821000 - Composite magnetic member and process for producing the member (1998-10-13),
8. 5352268 - Fe-Ni alloy fine powder of flat shape (1994-10-04),
9. 5246511 - High-strength lead frame material and method of producing same (1993-09-21),
10. 5135586 - Fe-Ni alloy fine powder of flat shape (1992-08-04),
11. 5098649 - Rare earth metal-iron group metal target, alloy powder therefor and (1992-03-24),
12. 5062885 - Rare earth metal-iron group metal target, alloy powder therefor and (1991-11-05),
13. 4957549 - Rare earth metal-iron group metal target, alloy powder therefor and (1990-09-18),
14. 4941920 - Sintered target member and method of producing same (1990-07-17),

Title: Tsutomu Inui: Innovator in Composite Magnetic Materials

Introduction

Tsutomu Inui is a prominent inventor based in Yonago, Japan, known for his significant contributions to the field of composite magnetic materials. With a total of 14 patents to his name, Inui has made remarkable advancements that enhance the performance of magnetic components in various applications.

Latest Patents

Inui's latest patents include innovative designs for composite magnetic members and processes for their production. One notable patent describes a composite magnetic member made from a single material that combines a ferromagnetic portion with superior soft magnetism and a non-magnetic portion that maintains stable characteristics. This member is crafted from an Fe–Cr–C-base alloy steel containing 0.1 to 5.0 weight % Al, achieving a ferromagnetic portion with a maximum magnetic permeability of not less than 400 and a non-magnetic portion with a magnetic permeability of not more than 2. The patent also outlines methods for producing the ferromagnetic portion and forming the non-magnetic portion, ensuring high-quality performance in practical applications.

Career Highlights

Throughout his career, Tsutomu Inui has worked with notable companies, including Hitachi Metals, Ltd. His work has significantly impacted the development of advanced magnetic materials, making him a respected figure in the industry.

Collaborations

Inui has collaborated with esteemed colleagues such as Keizo Takeuchi and Shinya Sugiura, contributing to the advancement of technology in his field.

Conclusion

Tsutomu Inui's innovative work in composite magnetic materials showcases his expertise and dedication to enhancing magnetic technology. His contributions continue to influence the industry and pave the way for future advancements.

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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