Dac Engineering Co., Ltd.

Calculating rank

USPTO Granted Patents = 2

Forward Citations = 132

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4 inventors (with patents filed for the assignee):

Shuichi Maeda (2 out of 2 patents)

Shigeru Hirooka (1 out of 2 patents)

Shigehiro Yamamoto (1 out of 1 patent)

4. Toshihiko Yamaguchi (1 out of 1 patent)

2 patents: Sort by Forward Citations

1. 4668095 - Positioning device (1987-05-26),

2. 4566032 - Visually guided vehicle (1986-01-21),

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USPTO Data Jan 1 1976 - Oct 27 2026

2 Patents

#292 in Kyoto 615-0031

#11,147 in Japan

Kyoto, Japan

Dac Engineering Co., Ltd.

Forward Citations = 132

4 inventors:

Shuichi Maeda (2 out of 2 patents)

Shigeru Hirooka (1 out of 2 patents)

Shigehiro Yamamoto (1 out of 1 patent)

4. Toshihiko Yamaguchi (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Dac Engineering Co., Ltd.. Retrieved from https://idiyas.com/company/dac-engineering-company

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]