% Expired Patents = 33.3

Forward Citations = 31

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5 inventors (with patents filed for the assignee):

Shumpei Kawasaki (1 out of 3 patents)

Toshiyasu Morita (1 out of 6 patents)

Takeshi Kitahara (1 out of 3 patents)

4. Tatsuo Yamamoto (1 out of 1 patent)

5. Motoyasu Tsunoda (1 out of 1 patent)

3 patents: Sort by Forward Citations

1. 6845908 - Storage card with integral file system, access control and cryptographic support (2005-01-25),

2. 6389584 - Gate input protection with a reduced number of antenna diodes (2002-05-14),

3. 6173342 - High speed bus interface for peripheral devices (2001-01-09),

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

3 Patents

#977 in San Jose, CA

#16,867 in California

#73,904 in US

San Jose, CA, United States of America

Hitachi Semiconductor (America) Inc.

Forward Citations = 31

5 inventors:

Shumpei Kawasaki (1 out of 3 patents)

Toshiyasu Morita (1 out of 6 patents)

Takeshi Kitahara (1 out of 3 patents)

4. Tatsuo Yamamoto (1 out of 1 patent)

5. Motoyasu Tsunoda (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Hitachi Semiconductor (America) Inc.. Retrieved from https://idiyas.com/company/hitachi-semiconductor-america

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]