Yokohama, Japan

Hiroshi Itagaki

This inventor holds 138 USPTO granted patents and 5 published patent applications and 1 EPO patent, primarily in Tape Storage Systems (CPC class G06F3-0682). Top assignees: International Business Machines Corporation, Canon Kabushiki Kaisha, Globalfoundries Inc.. Active years: 1992-2026.

USPTO Granted Patents = 138 

% Patents Active = 42.8

 

Average Co-Inventor Count = 4.6

ph-index = 11

Forward Citations = 396(Granted Patents)

Forward Citations (Not Self Cited) = 326(Dec 10, 2025)


Inventors with similar research interests:

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Location History:

  • Yamato, JP (2000 - 2016)
  • Tokyo, JP (1992 - 2018)
  • Kanagawa-ken, JP (2010 - 2018)
  • Kanagawa, JP (2018 - 2021)
  • Yokohama, JP (1992 - 2024)

Company Filing History:


Years Active: 1992-2026

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Areas of Expertise:
Magnetic Storage Media
Data Migration Management
Tape Cartridge Recall
File Reordering
Dynamic Data Buffer
Tape Library Optimization
Hierarchical Storage Management
Data Transfer Techniques
File System Caching
Tape Media Duplication
Read Order Determination
Tape Image Reclamation
138 patents (USPTO):Explore Patents

Title: Hiroshi Itagaki: Pioneering Innovator in Tape Storage Technologies

Introduction:

Hiroshi Itagaki, a renowned inventor hailing from Yokohama, Japan, has made significant contributions to the field of tape storage technologies. With an impressive portfolio of 123 patents, Itagaki has revolutionized the way data is stored, managed, and migrated in hierarchical storage environments. This article explores his latest patents, notable career highlights, and collaborations with industry-leading companies.

Latest Patents:

Among his recent accomplishments, Itagaki has received recognition for his pioneering work in storing modified or unmodified portions of a file based on tape loading. This computer-implemented method allows for efficient migration of file data in hierarchical storage environments. By detecting modifications to a file recalled from a magnetic tape, Itagaki's innovation enables the selective appending of either the modified portion or the entire file to the original or a different tape, depending on its availability.

Additionally, Itagaki has developed a dynamic tape storage device data buffer. This ingenious method alters the position at which a tape transitions to a DATA_FULL state, based on the size of the associated metadata index. By dynamically adjusting the transition point in the Data Partition of the tape, Itagaki's invention optimizes storage capacity and enhances the operational efficiency of tape storage systems.

Career Highlights:

Throughout his illustrious career, Itagaki has made crucial contributions while working with esteemed organizations. Notably, he has served at International Business Machines Corporation (IBM) and Canon Kabushiki Kaisha. Itagaki's involvement with these technology leaders has provided him with unique opportunities to work on cutting-edge projects and collaborate with brilliant minds in the industry.

Collaborations:

Itagaki's commitment to innovation is further exemplified through his collaborations with visionary coworkers such as Tohru Hasegawa and Shinsuke Mitsuma. Working alongside these esteemed professionals, Itagaki has harnessed their collective expertise to push the boundaries of tape storage technologies. These collaborations have significantly contributed to the advancement of the field and further solidify Itagaki's standing as a leading innovator.

Conclusion:

Hiroshi Itagaki's inventive prowess in the realm of tape storage technologies has left an indelible mark on the industry. With an impressive patent portfolio and a host of groundbreaking innovations, he has pioneered methods for efficient data migration and dynamic tape storage device management. Collaborating with reputable companies and talented colleagues, Itagaki continues to push the boundaries of what is possible in the ever-evolving world of storage technologies.

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