Duplo Manufacturing Corp.

Calculating rank

USPTO Granted Patents = 3

Forward Citations = 94

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4 inventors (with patents filed for the assignee):

Yoshihide Sugiyama (2 out of 9 patents)

Tetsuo Onishi (2 out of 2 patents)

Ken Matsushita (2 out of 2 patents)

4. Hiroki Ikeda (1 out of 1 patent)

3 patents: Sort by Forward Citations

1. 4605926 - Illegal-sheet-material detection apparatus in sheet material (1986-08-12),

2. 4566383 - Winding apparatus for removing used stencil (1986-01-28),

3. 4563947 - Ink detecting device for rotary printer (1986-01-14),

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USPTO Data Jan 1 1976 - Oct 27 2026

3 Patents

#33 in both of

#8,938 in Japan

both of, Japan

Duplo Manufacturing Corp.

Forward Citations = 94

4 inventors:

Yoshihide Sugiyama (2 out of 9 patents)

Tetsuo Onishi (2 out of 2 patents)

Ken Matsushita (2 out of 2 patents)

4. Hiroki Ikeda (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Duplo Manufacturing Corp.. Retrieved from https://idiyas.com/company/duplo-manufacturing

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]