logo

For the Inventor, By the Inventor

Kanagawa, Japan

Toshihiko Tsunokawa

This inventor holds 4 USPTO granted patents. Top assignee: Hitachi Global Storage Technologies Netherlands B.v.. Active years: 2004-2012.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Toshihiko Tsunokawa. Retrieved from https://idiyas.com/inventor/toshihiko-tsunokawa

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

USPTO Granted Patents = 4

% Patents Active = 25.0

Average Co-Inventor Count = 5.0

ph-index = 2

Forward Citations = 15(Granted Patents)


Location History:

  • Sagamihara, JP (2004 - 2006)
  • Kanagawa, JP (2011 - 2012)

Company Filing History:

goldMedal4 out of 2,636 
 
Hitachi Global Storage Technologies Netherlands B.v.
 patents

Years Active: 2004-2012

Loading Chart...
4 patents (USPTO):Explore Patents
1. 8098448 - Method for setting zone format of a disk for storing data and disk drive (2012-01-17),
2. 8068299 - Disk drive device and data rewrite method thereof (2011-11-29),
3. 7019921 - Control method and apparatus for reducing the effects of hard disk contamination (2006-03-28),
4. 6707634 - Control method and apparatus for reducing the effects of hard disk contamination (2004-03-16),

Title: Innovations of Toshihiko Tsunokawa

Introduction

Toshihiko Tsunokawa is a notable inventor based in Kanagawa, Japan. He has made significant contributions to the field of data storage technology, holding a total of 4 patents. His work focuses on improving the efficiency and reliability of disk drives.

Latest Patents

Tsunokawa's latest patents include a method for setting the zone format of a disk for storing data. This method involves dividing a data area on a disk into multiple concentric zones and determining a format for each zone to ensure that data tracks have the same number of data sectors. The process includes establishing provisional boundaries for the zones and determining a linear recording density for each selected zone. Additionally, he has developed a disk drive device and a data rewrite method that reduces the occurrence of read hard errors in hard disk drives (HDD). This method rewrites data on all data tracks of a block when a specified number of write operations occur, thereby enhancing the overall performance of the HDD.

Career Highlights

Tsunokawa is currently employed at Hitachi Global Storage Technologies Netherlands B.V., where he continues to innovate in the field of data storage. His work has been instrumental in advancing HDD technology and improving data management.

Collaborations

He has collaborated with notable colleagues such as Nobuhiro Kuwamura and Naoyuki Kagami, contributing to various projects that enhance data storage solutions.

Conclusion

Toshihiko Tsunokawa's contributions to data storage technology through his patents and collaborative efforts have made a significant impact in the industry. His innovative methods continue to shape the future of disk drive technology.

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]
Loading…