% Expired Patents = 100.0

EPO Patents = 1

Forward Citations = 0

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3 inventors (with patents filed for the assignee):

Toshio Endo (1 out of 20 patents)

Tetsuro Taguchi (1 out of 1 patent)

Keiji Fujiyoshi (1 out of 1 patent)

4. Tetsuro c/o Hokoku Corporation Taguchi (0 patent)

5. Toshio c/o Daicel Chemical Industries Ltd Endo (0 patent)

6. Keiji c/o Hokoku Corporation Fujiyoshi (0 patent)

1 patent: Sort by Forward Citations

#1,657 in Osaka

#15,745 in Japan

Hokoku Corporation

Forward Citations = 0

3 inventors:

Toshio Endo (1 out of 20 patents)

Tetsuro Taguchi (1 out of 1 patent)

Keiji Fujiyoshi (1 out of 1 patent)

4. Tetsuro c/o Hokoku Corporation Taguchi (0 patent)

5. Toshio c/o Daicel Chemical Industries Ltd Endo (0 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Hokoku Corporation. Retrieved from https://idiyas.com/company/hokoku

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]

1 patent (EPO):

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]