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For the Inventor, By the Inventor

Konosu, Japan

Kunio Kanai

This inventor holds 3 USPTO granted patents. Top assignee: Hitachi Metals, Ltd.. Active years: 1994.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kunio Kanai. Retrieved from https://idiyas.com/inventor/kunio-kanai-9m8djdnc

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

USPTO Granted Patents = 3

% Patents Active = 100.0

Average Co-Inventor Count = 2.3

ph-index = 2

Forward Citations = 27(Granted Patents)


Location History:

  • Konosu, JP (1994)
  • Saitama, JP (1994)
  • Kounosu, JP (1994)

Company Filing History:

goldMedal3 out of 2,333 
 
Hitachi Metals, Ltd.
 patents

Years Active: 1994

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3 patents (USPTO):Explore Patents
1. 5347412 - Floating magnetic head (1994-09-13),
2. 5323282 - Thin-film magnetic head (1994-06-21),
3. 5296312 - Non-magnetic substrate material and floating-type magnetic head (1994-03-22),

Title: Kunio Kanai: Innovator in Magnetic Head Technology

Introduction

Kunio Kanai is a notable inventor based in Konosu, Japan. He has made significant contributions to the field of magnetic head technology, holding a total of 3 patents. His work has been instrumental in advancing the performance and efficiency of magnetic heads used in various applications.

Latest Patents

One of Kanai's latest patents is for a floating magnetic head. This innovative design includes a non-magnetic substrate with a two-phase structure, which is utilized as a slider to control the coefficient of thermal expansion over a wide range. The air bearing surface is engineered to be appropriately rough, enhancing the CSS characteristics of the floating magnetic head. The substrate material primarily consists of MnO and NiO, with Al₂O₃ as a secondary component. Additionally, it can incorporate substances like CaO, Y₂O₃, ZrO₃, ZnO, and SrO. The substrate's average grain size ranges from 5 to 15 micrometers.

Another significant patent by Kanai is for a thin-film magnetic head. This design features a slider made from non-magnetic polycrystalline Mn–Zn ferrite, which contains between 0.02 to 7 wt% of various components, including CaO, MgO, ZrO₂, SnO₂, Al₂O₃, SrO, and NiO. The air bearings on the flotation surface side of the slider are designed with a concave-convex surface, ensuring that the convex portions occupy an area percentage between 20 to 80%.

Career Highlights

Kunio Kanai has been associated with Hitachi Metals, Ltd., where he has contributed to various innovative projects. His expertise in magnetic head technology has positioned him as a key figure in the industry.

Collaborations

Throughout his career, Kanai has collaborated with notable colleagues, including Yukio Ohta and Hideo Nitta. These collaborations have further enriched his work and contributed to advancements in magnetic head technology.

Conclusion

Kunio Kanai's contributions to the field of magnetic head technology are significant and impactful. His innovative patents reflect his dedication to enhancing the performance of magnetic heads, making him a prominent figure in the industry.

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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