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For the Inventor, By the Inventor

Nagaokakyo, Japan

Jozo Shimizu

This inventor holds 5 USPTO granted patents. Top assignee: Hitachi Maxell, Limited. Active years: 1981-1990.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Jozo Shimizu. Retrieved from https://idiyas.com/inventor/jozo-shimizu

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

USPTO Granted Patents = 5

% Patents Active = 100.0

Average Co-Inventor Count = 3.3

ph-index = 3

Forward Citations = 63(Granted Patents)


Location History:

  • Ibaraki, JP (1981)
  • Nagaoka, JP (1982)
  • Kyoto, JP (1988)
  • Nagaokakyo, JP (1986 - 1990)

Company Filing History:

goldMedal5 out of 1,112 
 
Hitachi Maxell, Limited
 patents

Years Active: 1981-1990

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5 patents (USPTO):Explore Patents
1. 4946374 - Magnetic recording medium (1990-08-07),
2. 4722863 - Magnetic recording medium (1988-02-02),
3. 4624883 - Magnetic recording medium (1986-11-25),
4. 4349608 - Magnetic recording medium (1982-09-14),
5. 4275113 - Magnetic recording medium (1981-06-23),

Title: Jozo Shimizu: Innovator in Magnetic Recording Technology

Introduction

Jozo Shimizu is a prominent inventor based in Nagaokakyo, Japan. He has made significant contributions to the field of magnetic recording technology, holding a total of 5 patents. His work has been instrumental in advancing the performance and efficiency of magnetic recording media.

Latest Patents

Shimizu's latest patents include innovative designs for magnetic recording media. One notable patent describes a magnetic recording medium that consists of a first magnetic layer on a base and a second magnetic layer above it. The first magnetic layer contains magnetic particles with an average particle length of 0.4 to 0.7 micrometers, while the second layer contains particles with an average length of 0.25 to 0.35 micrometers. This design achieves a coercive force ranging from 370 to 460 oersteds, with a specific ratio of coercive force between the two layers, resulting in excellent sensitivity and frequency characteristics across all frequency bands with reduced noise. Another patent focuses on a magnetic recording medium that includes a substrate and a magnetic layer coated on it. This magnetic layer contains magnetic powder, a resinous binding agent, and at least one sorbic acid compound, ensuring that the magnetic powder is well dispersed and enhancing the electrical properties of the medium.

Career Highlights

Jozo Shimizu is currently associated with Hitachi Maxell, Limited, where he continues to innovate in the field of magnetic recording technology. His work has not only contributed to the company's success but has also set new standards in the industry.

Collaborations

Throughout his career, Shimizu has collaborated with notable colleagues, including Satoru Yamaguchi and Kozaburoh Satoh. These collaborations have further enriched his work and have led to advancements in magnetic recording technologies.

Conclusion

Jozo Shimizu's contributions to magnetic recording technology are noteworthy and impactful. His innovative patents and collaborations reflect his dedication to advancing this field. His work continues to influence the industry and pave the way for future innovations.

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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