Forward Citations = 29

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8 inventors (with patents filed for the assignee):

Hiroshi Tsuji (1 out of 51 patents)

Kouji Inoue (1 out of 13 patents)

Masahiro Hiji (1 out of 2 patents)

4. Kenzo Moriyama (1 out of 2 patents)

5. Tsutomu Fujinami (1 out of 2 patents)

6. Kenji Tozuka (1 out of 1 patent)

7. Keiichiro Renge (1 out of 1 patent)

8. Toshiro Yamanaka (1 out of 2 patents)

2 patents: Sort by Forward Citations

1. 5504840 - Knowledge acquisition support system and method in an expert system (1996-04-02),

2. 5412802 - Reasoning method and fault diagnosis method and system implementing the (1995-05-02),

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

2 Patents

#35 in Miyagi

#11,139 in Japan

Miyagi, Japan

Hitachi Touhoku Software, Ltd.

Forward Citations = 29

8 inventors:

Hiroshi Tsuji (1 out of 51 patents)

Kouji Inoue (1 out of 13 patents)

Masahiro Hiji (1 out of 2 patents)

4. Kenzo Moriyama (1 out of 2 patents)

5. Tsutomu Fujinami (1 out of 2 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Hitachi Touhoku Software, Ltd.. Retrieved from https://idiyas.com/company/hitachi-touhoku-software

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]