% Expired Patents = 20.0

Forward Citations = 74

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10 inventors (with patents filed for the assignee):

Gordon James Smith (2 out of 168 patents)

Naoyuki Kagami (1 out of 47 patents)

Mohamad Towfik Krounbi (1 out of 93 patents)

4. Masayuki Murakami (1 out of 35 patents)

5. Spencer W Ng (1 out of 27 patents)

6. Tatsuya Sakai (1 out of 15 patents)

7. Yuzo Nakagawa (1 out of 15 patents)

8. Hal Hjalmar Ottesen (1 out of 103 patents)

9. Moris Musa Dovek (1 out of 125 patents)

10. Jeffrey William Carr (1 out of 5 patents)

5 patents: Sort by Forward Citations

1. 7062673 - System and method for sparing in RAID-1 system (2006-06-13),

2. 6678109 - Disk drive, servo control unit, and control unit (2004-01-13),

3. 6674598 - Radial positioning of data to improve hard disk drive reliability (2004-01-06),

4. 6674590 - System and method for estimating a frequency of slider airbearing resonance (2004-01-06),

5. 6607923 - Method of making magnetoresistive read/ inductive write magnetic head assembly fabricated with silicon on hard insulator for improved durability and electrostatic discharge protection (2003-08-19),

Company Overview

Hitachi Global Technologies is a leading provider of innovative IT solutions and services. With a focus on digital transformation and advanced technologies, Hitachi helps businesses optimize their operations and drive growth. Their comprehensive portfolio includes cloud computing, cybersecurity, AI, IoT, and more.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

5 Patents

#70 in

#1,131 in Netherlands

NL

Hitachi Global Technologies

Forward Citations = 74

10 inventors:

Gordon James Smith (2 out of 168 patents)

Naoyuki Kagami (1 out of 47 patents)

Mohamad Towfik Krounbi (1 out of 93 patents)

4. Masayuki Murakami (1 out of 35 patents)

5. Spencer W Ng (1 out of 27 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Hitachi Global Technologies. Retrieved from https://idiyas.com/company/hitachi-global-technologies

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

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]