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For the Inventor, By the Inventor

Hachioji, Japan

Masatoshi Takeshita

This inventor holds 32 USPTO granted patents, primarily in Magnetic Bubble Memory. Top assignee: Hitachi, Ltd.. Active years: 1981-2000.

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

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

USPTO Granted Patents = 32

% Patents Active = 100.0

Average Co-Inventor Count = 5.1

ph-index = 4

Forward Citations = 91(Granted Patents)


Location History:

  • Tokorozawa, JP (1985)
  • Tokyo, JP (1988)
  • Hachioji, JP (1981 - 1989)
  • Hachiouji, JP (1986 - 1991)
  • Hachiohji, JP (1992)
  • Iruma, JP (1994 - 2000)

Company Filing History:

goldMedal32 out of 42,740 
 
Hitachi, Ltd.
 patents

Years Active: 1981-2000

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Areas of Expertise:
Magnetic Recording Media
Electron Microscopy
Magnetic Bubble Memory
Hybrid Magnetic Bubble
Magnetic Bubble Detector
Bubble Memory Conductor
Scanning Interference
Microscopic Imaging
Magnetic Bubble Generator
Magnetic Bubble Stretcher
Memory Chip
Memory Device
32 patents (USPTO):Explore Patents
1. 6057021 - Magnetic recording media and magnetic recording system using the same (2000-05-02),
2. 5750230 - Magnetic recording media and magnetic recording system using the same (1998-05-12),
3. 5298747 - Scanning interference electron microscopy (1994-03-29),
4. 5153434 - Electron microscope and method for observing microscopic image (1992-10-06),
5. 5014239 - Magnetic bubble generator using plural conductors with common current (1991-05-07),
6. 4837741 - Magnetic bubble memory device (1989-06-06),
7. 4772505 - Magnetic bubble memory element (1988-09-20),
8. 4769783 - Magnetic bubble memory device (1988-09-06),
9. 4755430 - Magnetic bubble memory device (1988-07-05),
10. 4745578 - Magnetic bubble memory device (1988-05-17),
11. 4744052 - Hybrid magnetic bubble memory device (1988-05-10),
12. 4607349 - Magnetic bubble memory device (1986-08-19),
13. 4601013 - Magnetic bubble memory device (1986-07-15),
14. 4589095 - Magnetic bubble stretcher (1986-05-13),
15. 4589094 - Magnetic bubble device (1986-05-13),

Title: **Masatoshi Takeshita: A Pioneer in Magnetic Recording Technologies**

Introduction

Masatoshi Takeshita, based in Hachioji, Japan, has made significant contributions to the field of magnetic recording technology. With an impressive portfolio of 32 patents, Takeshita has established himself as an influential inventor in the industry. His work primarily focuses on innovations in magnetic recording media, enhancing data storage capabilities.

Latest Patents

Among his latest patents, Takeshita has developed a magnetic recording medium that incorporates a non-magnetic disk substrate with a specifically engineered magnetic film. This invention showcases a surface average roughness factor (Ra(r)) ranging from 0.3 nm to 3 nm, an orientation ratio of coercivity from 0.1 to 0.7, and an in-plane magnetic anisotropic energy between 3×10⁴ J/m³ to 5×10⁵ J/m³. Such specifications result in a magnetic recording apparatus capable of flying the magnetic head at low positions while achieving high-density recording. This innovative medium is expected to revolutionize the performance and efficiency of magnetic recording systems.

Career Highlights

Masatoshi Takeshita has made remarkable strides in his career at Hitachi, Ltd. His expertise in magnetic recording technologies has not only advanced the company's research and development efforts but has also contributed significantly to the broader field of information technology. Takeshita’s innovative ideas have paved the way for new applications and advancements in data storage solutions.

Collaborations

Throughout his career, Takeshita has collaborated with talented colleagues, including Ryo Suzuki and Teruaki Takeuchi. Together, they have worked on various projects, pushing the boundaries of technology and enhancing the capabilities of magnetic recording media.

Conclusion

Masatoshi Takeshita remains a key figure in the innovation of magnetic recording systems, with his extensive patent portfolio underscoring his contributions to the field. His latest advancements promise to reshape how data is recorded and stored, reflecting his dedication to pioneering new technologies. As he continues to collaborate with fellow innovators, the future of magnetic recording looks promising with Takeshita at the forefront.

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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