Kawasaki, Japan

Takeyori Hara

This inventor holds 58 USPTO granted patents and 9 published patent applications, primarily in Magnetic Disk Technology. Top assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation, Fujitsu Corporation. Active years: 1998-2026.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Takeyori Hara. Retrieved from https://idiyas.com/inventor/takeyori-hara

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

USPTO Granted Patents = 58 

% Patents Active = 82.8

Average Co-Inventor Count = 2.1

ph-index = 7

Forward Citations = 128(Granted Patents)

Forward Citations (Not Self Cited) = 94(Dec 10, 2025)


Location History:

  • Fuchu, JP (2014)
  • Kanagawa, JP (2015 - 2021)
  • Kawasaki, JP (1998 - 2023)
  • Kawasaki Kanagawa, JP (2016 - 2024)

Company Filing History:


Years Active: 1998-2026

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Areas of Expertise:
Magnetic Disk Device
Control Method
Head Positioning
Disturbance Compensation
Two-Dimensional Recording
Servo Write Processing
Bias Voltage Switching
Data Recording Method
Skew Angle Correction
Random Mixed-R/W Commands
Linearity Error Correction
Microactuator Control
58 patents (USPTO):Explore Patents

Title: Innovator Takeyori Hara: A Pioneer in Magnetic Disk Technology

Introduction: Takeyori Hara, a renowned inventor based in Kawasaki, Kanagawa, Japan, has significantly contributed to the field of magnetic disk technology. With an impressive portfolio of 49 patents, Hara's work has advanced the functionality and efficiency of magnetic disk devices and systems. His innovative designs reveal a deep understanding of the intricacies involved in data storage technology.

Latest Patents: Among his latest innovations, two patents stand out: the "Magnetic Disk Device and Method" and the "Magnetic Disk Apparatus and Method."

The "Magnetic Disk Device and Method" outlines a sophisticated controller mechanism that calculates the power required for unloading the magnetic head while considering the VCM's operational state. It smartly manages data writing processes to ensure data integrity, particularly in scenarios where external power may be lost.

The "Magnetic Disk Apparatus and Method" describes a controller that moves the magnetic head to a specified track on the disk, monitoring positioning errors. By estimating residual vibrations, the controller enhances accuracy during data access operations, leading to improved performance and reliability.

Career Highlights: Throughout his career, Takeyori Hara has collaborated with prestigious organizations, including Kabushiki Kaisha Toshiba and Toshiba Electronic Devices & Storage Corporation. His roles in these companies have allowed him to refine his expertise in magnetic disk technologies, helping to push the boundaries of what is possible in data storage solutions.

Collaborations: Hara has worked alongside talented professionals such as Takayuki Kawabe and Daisuke Sudo, contributing to various projects that have resulted in groundbreaking patents. Their collective efforts highlight the importance of teamwork in driving innovation and enhancing technological robustness.

Conclusion: Takeyori Hara’s contributions to magnetic disk technology demonstrate the critical role of inventive minds in shaping the future of data storage. With each patent, he not only adds to his distinguished legacy but also paves the way for new advancements that will benefit industries reliant on reliable and efficient data management 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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