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For the Inventor, By the Inventor

Fujisawa, Japan

Mikihiko Tokunaga

USPTO Granted Patents = 9

Average Co-Inventor Count = 4.7

ph-index = 6

Forward Citations = 111(Granted Patents)


Location History:

  • Yokohama, JP (1989 - 2006)
  • Fujisawa, JP (2004 - 2010)

Company Filing History:

goldMedal9 out of 42,485 
 
Hitachi, Ltd.
 patents

Years Active: 1989-2010

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9 patents (USPTO):Explore Patents
1. 7702865 - Storage system and data migration method (2010-04-20),
2. 7506101 - Data migration method and system (2009-03-17),
3. 7120625 - Method and apparatus for document information management (2006-10-10),
4. 7054860 - Method and system for retrieving a document and computer readable storage medium (2006-05-30),
5. 6865571 - Document retrieval method and system and computer readable storage medium (2005-03-08),
6. 6757676 - Text mining method and apparatus allowing a user to analyze contents of a document set from plural analysis axes (2004-06-29),
7. 6738786 - Data display method and apparatus for use in text mining (2004-05-18),
8. 4979109 - Method of controlling a data dictionary directory system in a data base (1990-12-18),
9. 4833597 - Dictionary/directory management method in database system (1989-05-23),

Title: Mikihiko Tokunaga: Innovator in Data Migration Systems

Introduction

Mikihiko Tokunaga is a notable inventor based in Fujisawa, Japan, recognized for his contributions to data migration technology. With a robust portfolio of nine patents, Tokunaga is influential in the field of data storage systems. His work has led to significant advancements in making data migration more efficient and responsive to the needs of diverse applications.

Latest Patents

Among his most recent innovations are two patents focusing on a storage system and a data migration method. The first patent presents a storage system and method that optimizes data migration by taking into account the correlation between data managed by specific applications. This involves collecting operational information for each volume and calculating both the required performance level for data storage and the actual performance level. Through this, Tokunaga’s invention intelligently migrates data to alternate volumes that meet the required performance criteria, ensuring smooth data handling and minimal interruption.

The second patent introduces a data migration technique designed to fulfill performance requirements as closely as possible. It employs a server that gathers IOPS (Input/Output Operations Per Second) measurements from multiple business applications and logical volumes. The server then identifies optimal source and target volumes for data migration, selecting pairs that promise the most favorable migration results based on performance forecasting.

Career Highlights

Mikihiko Tokunaga is currently employed at Hitachi, Ltd., a leading technology company known for its innovative solutions in various fields, including data storage and information technology. His role within this esteemed organization highlights his expertise and commitment to advancing technology in data management systems.

Collaborations

Throughout his career, Tokunaga has collaborated with distinguished professionals such as Yasuhiko Inaba and Katsumi Tada. These collaborations foster an environment of innovation and expertise, contributing to the robust advancements in the company's technological offerings.

Conclusion

Mikihiko Tokunaga stands out as a prominent inventor in the realm of data migration technology. Through his innovative patents, he continues to influence the way data is stored and managed, providing valuable solutions that benefit multiple applications. As technology evolves, Tokunaga's contributions will undoubtedly play a pivotal role in shaping efficient data management systems for the future.

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