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Kinokawa, Japan

Duplo Seiko Corporation

USPTO Granted Patents = 47

% Expired Patents = 29.8

EPO Patents = 27

Forward Citations = 157

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44 inventors (with patents filed for the assignee):

Hideki Oiwa (12 out of 12 patents)

Ryuichi Oota (9 out of 9 patents)

Yoshihide Sugiyama (9 out of 9 patents)

4. Masasuke Funase (7 out of 7 patents)

5. Kazuya Yamamoto (6 out of 6 patents)

6. Akihiko Toki (5 out of 5 patents)

7. Takaaki Maeda (5 out of 6 patents)

8. Tomoyuki Nagayama (4 out of 5 patents)

9. Akira Kawaguchi (4 out of 4 patents)

10. Katsunori Takahashi (4 out of 5 patents)

11. Kenta Yamada (4 out of 4 patents)

12. Masayasu Matsumoto (3 out of 3 patents)

13. Akane Tokutake (3 out of 3 patents)

14. Nobuki Tanimoto (3 out of 3 patents)

15. Akira Wada (3 out of 3 patents)

Core Competencies:

Paper Folding Device

Sheet Processing Apparatus

Paper Sorting Device

Sheet Bundle Conveying Apparatus

Paper Ejecting Device

Stencil Printing Machine

Bookbinding Apparatus

Adhesive Coating Device

Sheet Transport Apparatus

Processing Job Generation Apparatus

Waste Paper Recycling Apparatus

Double-Sided Image Forming Device

47 patents: Sort by Forward Citations

1. 12668449 - Stacker and machining processing device (2026-06-30),

2. 12492096 - Paper folding device (2025-12-09),

3. 12459149 - Apparatus for processing sheets (2025-11-04),

4. 12220829 - Sheet processing system (2025-02-11),

5. 12202693 - Paper sorting device and machining processing device (2025-01-21),

6. 12049376 - Paper folding device (2024-07-30),

7. 12049056 - Paper folding device (2024-07-30),

8. 12030205 - Sheet processing apparatus (2024-07-09),

9. 12024391 - Sheet processing apparatus (2024-07-02),

10. 11762366 - Sheet processing apparatus (2023-09-19),

11. 11604616 - Processing job generation apparatus and sheet processing system (2023-03-14),

12. 11358818 - Control apparatus and feeding apparatus (2022-06-14),

13. 11325798 - Feeding device and sheet processing device with the same (2022-05-10),

14. 11052630 - Sheet processor and sheet processing apparatus (2021-07-06),

15. 10850414 - Sheet material processing device and sheet material processing apparatus (2020-12-01),

DUPLO SEIKO CORPORATION is a leading global manufacturer of printing and finishing equipment. With a history dating back to 1951, the company has established itself as a trusted provider of innovative and reliable solutions for the graphic arts industry. DUPLO's product portfolio includes digital printing machines, paper cutters, creasers, folders, and various bindery equipment. The company is committed to delivering high-quality and environmentally-friendly products that enhance productivity and help businesses thrive in today's competitive market.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Sep 29 2026

47 Patents

#1 in Kinokawa

#1,775 in Japan

#14,796 in the World

Kinokawa, Japan

Duplo Seiko Corporation

Forward Citations = 157

44 inventors:

Hideki Oiwa (12 out of 12 patents)

Ryuichi Oota (9 out of 9 patents)

Yoshihide Sugiyama (9 out of 9 patents)

4. Masasuke Funase (7 out of 7 patents)

5. Kazuya Yamamoto (6 out of 6 patents)

Please report any incorrect information to [email protected]

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