Tsuyoshi Arai

This inventor holds 7 USPTO granted patents. Top assignees: Hitachi, Ltd., Hitachi Global Storage Technologies Japan, Ltd.. Active years: 1999-2008.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Tsuyoshi Arai. Retrieved from https://idiyas.com/inventor/tsuyoshi-arai-vrewrgik

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

USPTO Granted Patents = 7

% Patents Active = 57.1

Average Co-Inventor Count = 6.0

ph-index = 6

Forward Citations = 98(Granted Patents)

Company Filing History:

Hitachi Global Storage Technologies Japan, Ltd.

patents

Years Active: 1999-2008

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7 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 7375917 - Idle seek calibration method for magnetic disk drive and magnetic disk drive with an intermission calibration (2008-05-20),

2. 6920007 - Load/unload method and a magnetic disk drive using the method (2005-07-19),

3. 6597532 - Information recording disk apparatus (2003-07-22),

4. 6510014 - Disturbance detection circuit, memory device thereof, and disturbance detection method (2003-01-21),

5. 6407876 - Magnetic disk apparatus having an accelerometer for detecting acceleration in the positioning direction of the magnetic head (2002-06-18),

6. 6335845 - Magnetic disk apparatus having an accelerometer for detecting acceleration in the positioning direction of the magnetic head (2002-01-01),

7. 5986845 - Apparatus for positioning magnetic head and method of the same (1999-11-16),

Title: Tsuyoshi Arai: Innovator in Magnetic Disk Drive Technology

Introduction

Tsuyoshi Arai is a prominent inventor based in Odawara, Japan. He has made significant contributions to the field of magnetic disk drive technology, holding a total of 7 patents. His work focuses on improving the efficiency and stability of magnetic disk drives, particularly in portable systems.

Latest Patents

Arai's latest patents include an idle seek calibration method for magnetic disk drives and a magnetic disk drive utilizing an innovative load/unload method. The idle seek calibration method addresses the challenges posed by temperature variations affecting the velocity control of the VCM actuator. By executing a calibration using control information, Arai enhances the stability of the velocity control, thereby reducing power consumption during idle seek operations. This improvement is particularly beneficial for portable systems, such as notebook computers, where battery efficiency is crucial.

The load/unload method he developed ensures stable control of the slider's speed during load and unload operations. By utilizing magnetic disk media with pre-written servo information, Arai's method prevents slowdown or temporary stops of the actuator, thus optimizing the performance of magnetic disk drives.

Career Highlights

Throughout his career, Tsuyoshi Arai has worked with notable companies, including Hitachi, Ltd. and Hitachi Global Storage Technologies Japan, Ltd. His experience in these organizations has allowed him to refine his expertise in magnetic disk technology and contribute to advancements in the field.

Collaborations

Arai has collaborated with esteemed colleagues, including Yoshikatsu Fujii and Yosuke Hamada. Their combined efforts have led to innovative solutions in magnetic disk drive technology.

Conclusion

Tsuyoshi Arai's contributions to magnetic disk drive technology have significantly impacted the industry. His innovative patents and collaborative efforts continue to enhance the performance and efficiency of magnetic storage systems.

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]