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For the Inventor, By the Inventor

Ibaraki, Japan

Taketoshi Yonezawa

This inventor holds 12 USPTO granted patents. Top assignee: Matsushita Electric Industrial Co., Ltd.. Active years: 1979-1991.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Taketoshi Yonezawa. Retrieved from https://idiyas.com/inventor/taketoshi-yonezawa

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

USPTO Granted Patents = 12

% Patents Active = 100.0

Average Co-Inventor Count = 3.6

ph-index = 8

Forward Citations = 390(Granted Patents)


Location History:

  • Minoo, JP (1982)
  • Osaka, JP (1985 - 1987)
  • Ibaraki, JP (1979 - 1991)

Company Filing History:

goldMedal12 out of 27,375 
 
Matsushita Electric Industrial Co., Ltd.
 patents

Years Active: 1979-1991

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12 patents (USPTO):Explore Patents
1. 4991919 - Optical head apparatus including concentric, periodic grating in a (1991-02-12),
2. 4835070 - Magnetic recording medium and method of producing the same (1989-05-30),
3. 4833031 - Magnetic recording medium (1989-05-23),
4. 4717622 - Magnetic recording media (1988-01-05),
5. 4645977 - Plasma CVD apparatus and method for forming a diamond like carbon film (1987-02-24),
6. 4636077 - Aligning exposure method (1987-01-13),
7. 4523102 - Solid-state color-image sensor and process for fabricating the same (1985-06-11),
8. 4418284 - Solid-state color-image sensor and process for fabricating the same (1983-11-29),
9. 4388128 - Solid-state color-image sensor and process for fabricating the same (1983-06-14),
10. 4358295 - Polishing method (1982-11-09),
11. 4238215 - Magnetic head and method for preparing the same (1980-12-09),
12. 4170032 - Magnetic head and method for preparing the same (1979-10-02),

Title: The Innovative Contributions of Taketoshi Yonezawa

Introduction

Taketoshi Yonezawa is a prominent inventor based in Ibaraki, Japan. He has made significant contributions to the field of magnetic recording technology, holding a total of 12 patents. His work has been instrumental in advancing the capabilities of optical head apparatuses and magnetic recording media.

Latest Patents

One of Yonezawa's latest patents involves an optical head apparatus that includes a concentric, periodic grating in a magnetic recording medium. This innovative magnetic recording medium features a non-magnetic substrate, a magnetic layer containing a ferromagnetic material, and a protective film. The protective film is composed of a singular layer of continuous or dispersed molecular structures, where carbon and an element from the magnetic layer are bonded through oxygen, with at least one fluorine atom bonded to the carbon. This medium can be produced using a method that includes preparing a non-magnetic substrate, forming a magnetic layer, and applying a protective film through a plasma CVD method.

Career Highlights

Yonezawa is associated with Matsushita Electric Industrial Co., Ltd., a company known for its innovative electronic products. His work has significantly impacted the development of advanced magnetic recording technologies, enhancing data storage and retrieval processes.

Collaborations

Throughout his career, Yonezawa has collaborated with notable colleagues, including Hideo Kurokawa and Tsutomu Mitani. These collaborations have fostered a creative environment that has led to numerous advancements in their respective fields.

Conclusion

Taketoshi Yonezawa's contributions to the field of magnetic recording technology are noteworthy. His innovative patents and collaborations have played a crucial role in shaping modern data storage solutions.

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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