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For the Inventor, By the Inventor

Omiya, Japan

Takuo Takeshita

This inventor holds 33 USPTO granted patents, primarily in Superconducting Materials. Top assignees: Mitsubishi Materials Corporation, Mitsubishi Metal Corporation, Mitsubishi Denki Kabushiki Kaisha. Active years: 1987-1996.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Takuo Takeshita. Retrieved from https://idiyas.com/inventor/takuo-takeshita

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

Calculating rank
USPTO Granted Patents = 33

% Patents Active = 100.0

Average Co-Inventor Count = 3.1

ph-index = 9

Forward Citations = 234(Granted Patents)


Location History:

  • Kawagoe, JP (1992)
  • Ohmiya, JP (1990 - 1993)
  • Omiya, JP (1987 - 1996)
  • Saitama, JP (1990 - 1996)
  • Saitama-ken, JP (1996)

Company Filing History:

goldMedal18 out of 1,556 
 
Mitsubishi Materials Corporation
 patents
silverMedal11 out of 68 
 
Mitsubishi Metal Corporation
 patents
bronzeMedal2 out of 21,351 
 
Mitsubishi Denki Kabushiki Kaisha
 patents
4. 2 out of 197 
 
Mitsubishi Kinzoku Kabushiki Kaisha
 patents
5. 1 out of 412 
 
Dai Nippon Insatsu Kabushiki Kaisha
 patents
6. 1 out of 2 
 
Mitsubishi Kinzoku K.k.
 patents
7. 1 out of 5,300 
 
Nippon Telegraph and Telephone Corporation
 patents
8. 1 out of 3,975 
 
The United States of America as Represented by the United States
 patents
where one patent can have more than one assignee

Years Active: 1987-1996

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Areas of Expertise:
Superconducting Materials
Rare Earth Magnets
Magnetic Powders
Anisotropic Powders
Heat Treating
Sintered Alloys
Ceramic Wiring
Hydrogenation
Sputtering Targets
Oxide Superconductors
Coercive Force
Ceramic Materials
33 patents (USPTO):Explore Patents
1. 5587024 - Solid resin-coated magnet powder and a method for producing an (1996-12-24),
2. 5543070 - Magnetic recording powder having low curie temperature and high (1996-08-06),
3. 5505794 - Method for heat treating metallic materials and apparatus therefor (1996-04-09),
4. 5486239 - Method of manufacturing magnetically anisotropic R-T-B-M powder material (1996-01-23),
5. 5417773 - Method for producing rare earth alloy magnet powder (1995-05-23),
6. 5395462 - Anisotropic rare earth-Fe-B system and rare earth-Fe-Co-B system magnet (1995-03-07),
7. 5372657 - Amorphous material for regenerator (1994-12-13),
8. 5360784 - Method for manufacturing an oxide superconducting tape (1994-11-01),
9. 5354040 - Apparatus for closed cycle hydrogenation recovery and rehydrogenation (1994-10-11),
10. 5338371 - Rare earth permanent magnet powder, method for producing same and bonded (1994-08-16),
11. 5252549 - Superconductive ceramic wire and method for making same (1993-10-12),
12. 5250206 - Rare earth element-Fe-B or rare earth element-Fe-Co-B permanent magnet (1993-10-05),
13. 5236889 - Process for producing Bi-Ca-Sr-Cu-O, TL-Ca-Sr-Cu-O and Tl-Ba-Ca-Cu-O (1993-08-17),
14. 5228930 - Rare earth permanent magnet power, method for producing same and bonded (1993-07-20),
15. 5211770 - Magnetic recording powder having a high coercive force at room (1993-05-18),

Title: **Takuo Takeshita: A Pioneer in Magnetic Technologies**

Introduction

Takuo Takeshita, located in Omiya, Japan, is a prominent inventor known for his significant contributions in the field of magnetic materials and technologies. With a remarkable portfolio of 33 patents, Takeshita has established himself as a leader in the innovation of solid resin-coated magnet powders and magnetic recording materials.

Latest Patents

Takeshita's latest patents showcase his innovative approach to magnetic technology. One of his recent inventions is a solid resin-coated magnet powder and a method for producing it. This invention focuses on creating an improved anisotropic bonded magnet by coating individual anisotropic magnet powder particles with a solid resin layer. The method involves kneading an anisotropic magnet powder with solid resin under reduced pressure, granulating the mixture, and milling it to obtain the desired composite particles.

Another noteworthy invention by Takeshita is a magnetic recording powder that features a low Curie temperature and high saturation magnetization. This composite oxide, with a hexagonal ferrite crystal structure, contains specific percentages of strontium oxide, barium oxide, chromium oxide, and other elements, allowing it to achieve a saturation magnetization of 15 emu/g or higher, with a Curie temperature of 155°C or lower.

Career Highlights

Takuo Takeshita has made significant contributions while working with esteemed companies such as Mitsubishi Materials Corporation and Mitsubishi Metal Corporation. His work at these organizations has enabled him to develop advanced materials that continue to impact the industry significantly.

Collaborations

Throughout his career, Takeshita has collaborated with notable professionals, including Ryoji Nakayama and Tadashi Sugihara. These collaborations have fostered innovation and technological advancements within the field of magnetics.

Conclusion

Takuo Takeshita's innovative spirit and dedication to developing advanced magnetic materials have earned him recognition as a key figure in the industry. His patents reflect a commitment to enhancing magnetic technologies, and his career trajectory shows a pattern of collaboration and excellence that will likely inspire future generations of inventors.

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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