Yokohama, Japan

Hiroyuki Kumazaki

This inventor holds 8 USPTO granted patents. Top assignee: Hitachi, Ltd.. Active years: 1995-2006.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hiroyuki Kumazaki. Retrieved from https://idiyas.com/inventor/hiroyuki-kumazaki

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

Calculating rank

% Patents Active = 75.0

Average Co-Inventor Count = 4.0

ph-index = 6

Forward Citations = 184(Granted Patents)


Location History:

  • Yokohama, JP (1995 - 2004)
  • Tokyo, JP (2006)

Company Filing History:


Years Active: 1995-2006

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8 patents (USPTO):Explore Patents

Title: **Innovator Hiroyuki Kumazaki: Transforming File Systems at Hitachi, Ltd.**

Introduction

Hiroyuki Kumazaki, located in Yokohama, Japan, is a distinguished inventor and a significant contributor to the field of file systems. With a remarkable portfolio of 8 patents to his name, Kumazaki has demonstrated a profound ability to enhance data management and I/O control systems through his innovative solutions.

Latest Patents

Kumazaki's latest patents showcase his inventive prowess in creating advanced file systems. One of his notable patents, titled "File system for creating switched logical I/O paths for fault recovery," introduces a method to streamline fault recovery processes. This system employs defined file IDs and logical disk IDs to allow file servers to efficiently access physical disk devices, significantly reducing the time taken to switch I/O paths while keeping the switching process transparent to users.

Another remarkable patent, "High speed file I/O control system with user-set file structure to effect parallel access pattern over a network," focuses on enhancing access patterns over a network. This patent details a storage medium that supports multiple computers accessing shared disks, improving data retrieval through efficient management of data access requests.

Career Highlights

Kumazaki serves at Hitachi, Ltd., where his innovations have significantly influenced the company's offerings in data storage solutions. His work exemplifies the blend of technical expertise and creativity, allowing Hitachi to maintain a competitive edge in the technology sector.

Collaborations

Throughout his career, Kumazaki has collaborated with talented professionals such as Naoki Utsunomiya and Koji Sonoda. These partnerships have fostered a dynamic environment for idea exchange and accelerated the development of groundbreaking solutions in file systems and data management.

Conclusion

Hiroyuki Kumazaki's contributions to the field of file systems mark him as a notable inventor in contemporary technology. His innovations not only demonstrate his technical acumen but also his commitment to improving user experiences in data management. As he continues to expand his portfolio, the industry eagerly anticipates his future endeavors.

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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