Ome, Japan

Masafumi Iwashiro

This inventor holds 20 USPTO granted patents and 5 published patent applications. Top assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation. Active years: 1998-2026.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masafumi Iwashiro. Retrieved from https://idiyas.com/inventor/masafumi-iwashiro

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

USPTO Granted Patents = 20 

% Patents Active = 70.0

Average Co-Inventor Count = 1.3

ph-index = 5

Forward Citations = 53(Granted Patents)


Location History:

  • Ome, JP (2004 - 2008)
  • Tokyo, JP (1998 - 2014)
  • Kanagawa, JP (2014 - 2024)
  • Yokohama Kanagawa, JP (2019 - 2024)

Company Filing History:


Years Active: 1998-2026

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20 patents (USPTO):Explore Patents

Title: Masafumi Iwashiro: Innovator in Magnetic Disk Technology

Introduction

Masafumi Iwashiro is a prominent inventor based in Ome, Japan, known for his significant contributions to magnetic disk technology. With a total of 19 patents to his name, Iwashiro has made remarkable advancements in the field, particularly in the design and manufacturing of disk devices.

Latest Patents

Iwashiro's latest patents include a magnetic disk device and method, which involves a controller that corrects an instruction value of a voice coil motor (VCM) current through a first feedforward control based on a detection value from a sensor. This innovative method allows for the acquisition of a waveform that represents the deviation of a magnetic head's position from its target, enabling adjustments to improve accuracy. Another notable patent is a method for manufacturing disk devices and a computer program product, which specifies a frequency to be corrected by an additional filter based on head position error spectra, ensuring optimal performance in disk devices.

Career Highlights

Throughout his career, Masafumi Iwashiro has worked with notable companies such as Toshiba Corporation and Toshiba Electronic Devices & Storage Corporation. His work has significantly impacted the development of storage technologies, enhancing the efficiency and reliability of magnetic disk devices.

Collaborations

Iwashiro has collaborated with esteemed colleagues, including Masahide Yatsu and Hideo Sado, contributing to various projects that have advanced the field of magnetic storage technology.

Conclusion

Masafumi Iwashiro's innovative work in magnetic disk technology has established him as a key figure in the industry. His patents and collaborations reflect his commitment to advancing technology and improving the performance of disk devices.

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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