% Expired Patents = 50.0

Forward Citations = 4

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6 inventors (with patents filed for the assignee):

Fumio Takaiwa (2 out of 12 patents)

Yoshihiro Fujiwara (2 out of 2 patents)

Kenji Sekikawa (2 out of 2 patents)

4. Noriko Tsuji (1 out of 3 patents)

5. Yasuhiko Aiki (1 out of 1 patent)

6. Lijun Yang (1 out of 1 patent)

2 patents: Sort by Forward Citations

#78 in Ibaraki

#11,133 in Japan

Preventec, Inc.

Forward Citations = 4

6 inventors:

Fumio Takaiwa (2 out of 12 patents)

Yoshihiro Fujiwara (2 out of 2 patents)

Kenji Sekikawa (2 out of 2 patents)

4. Noriko Tsuji (1 out of 3 patents)

5. Yasuhiko Aiki (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Preventec, Inc.. Retrieved from https://idiyas.com/company/preventec

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]