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Gradco Japan Ltd.

USPTO Granted Patents = 60

% Expired Patents = 21.7

EPO Patents = 1

Forward Citations = 348

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46 inventors (with patents filed for the assignee):

Peter M Coombs (25 out of 29 patents)

Frederick J Lawrence (7 out of 23 patents)

Koichi Kamoi (7 out of 7 patents)

4. Kuniaki Kimura (6 out of 6 patents)

5. Kenji Umehara (6 out of 6 patents)

6. Masakazu Takeuchi (5 out of 5 patents)

7. Kenichi Watanabe (4 out of 47 patents)

8. Kiichiro Noguchi (4 out of 4 patents)

9. Klaus Thogersen (4 out of 7 patents)

10. Yumiko Kato (3 out of 8 patents)

11. Kazushige Masunari (3 out of 3 patents)

12. Seung-kyoon Noh (3 out of 7 patents)

13. James R Seay (3 out of 4 patents)

14. Bradford Billings (3 out of 4 patents)

15. Tomoaki Iwafune (3 out of 3 patents)

Core Competencies:

Bookbinding Apparatus

Sheet Processing Device

Automatic Stapler

High-Speed Post Processing

Multiple Stapling Apparatus

Sheet Feeding Apparatus

Offset Printing Machine

Sorter with Pivotable Diverter

Continuous Sheet Stacker

Mailing Envelopes

Paper Plate Manufacturing

In-Bin Stapling Sorter

60 patents: Sort by Forward Citations

1. 9725272 - Paper post-processing device (2017-08-08),

2. 9028190 - Bookbinding apparatus (2015-05-12),

3. 9022377 - Sheet processing apparatus (2015-05-05),

4. 8840099 - Binding apparatus (2014-09-23),

5. 8511679 - Sheet processing device (2013-08-20),

6. 8393607 - Sheet processing device (2013-03-12),

7. 8257006 - Bookbinding device (2012-09-04),

8. 8157493 - Book binding device (2012-04-17),

9. 7942087 - Sheet punching apparatus and method for controlling the same (2011-05-17),

10. 7866648 - Multiple stapling apparatus (2011-01-11),

11. 7766328 - Sheet feeding apparatus with buffer system (2010-08-03),

12. 7450881 - Finishing apparatus of image forming apparatus (2008-11-11),

13. 7104538 - Sheet post processing device (2006-09-12),

14. 6948224 - Automatic stapling method and stapler (2005-09-27),

15. 6746008 - SET FINISHING DEVICE HAVING A SINGLE MOTOR DRIVEN APPARATUS FOR POSITIONING THE SET FINISHING DEVICE IN A PLURALITY OF DIFFERENT FINISHING STATIONS AND MOVING THE SET FINISHING DEVICE INTO AND OUT OF FINISHING POSITION (2004-06-08),

Company Overview

Gradco Japan Ltd., based in Tokyo, specializes in advanced sheet processing technology, focusing on innovative solutions for the printing and binding industries. The company develops a range of equipment, including bookbinding apparatus, automatic staplers, and high-speed post-processing devices. With expertise in sheet feeding and sorting technologies, Gradco enhances operational efficiency and productivity in printing workflows. Their commitment to quality and innovation positions them as a key player in the field of sheet processing technology.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

60 Patents

#722 in Tokyo

#1,534 in Japan

#12,083 in the World

Gradco Japan Ltd.

Forward Citations = 348

46 inventors:

Peter M Coombs (25 out of 29 patents)

Frederick J Lawrence (7 out of 23 patents)

Koichi Kamoi (7 out of 7 patents)

4. Kuniaki Kimura (6 out of 6 patents)

5. Kenji Umehara (6 out of 6 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Gradco Japan Ltd.. Retrieved from https://idiyas.com/company/gradco-japan

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]

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