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Gakken Co., Ltd.

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USPTO Granted Patents = 15

% Expired Patents = 6.7

Forward Citations = 103

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20 inventors (with patents filed for the assignee):

Fukuji Hachimura (3 out of 3 patents)

Shozo Ishiyama (2 out of 6 patents)

Masao Iwaoka (2 out of 2 patents)

4. Yosuke Igeta (2 out of 2 patents)

5. Fumio Kobayashi (2 out of 2 patents)

6. Tatsuhiko Sugai (2 out of 2 patents)

7. Toyochika Kiku (2 out of 2 patents)

8. Ichiro Noguchi (2 out of 3 patents)

9. Kenzo Kurosawa (2 out of 3 patents)

10. Yoshinobu Kimura (1 out of 64 patents)

11. Yoshitada Okuno (1 out of 1 patent)

12. Nobuyuki Baba (1 out of 2 patents)

13. Michito Amma (1 out of 1 patent)

14. Katsuhiko Itasaka (1 out of 1 patent)

15. Chisaburo Kimoto (1 out of 1 patent)

15 patents: Sort by Forward Citations

1. 7299262 - Information providing support system and method, and program and server for use in the system and method (2007-11-20),

2. D261165 - Toy animal figure (1981-10-06),

3. 4288813 - Apparatus for automatically engraving mimeographic stencil papers (1981-09-08),

4. 4273541 - Clock for educational purposes (1981-06-16),

5. 4262432 - Study device (1981-04-21),

6. 4258477 - Multiplication study device (1981-03-31),

7. 4222195 - Combination of running toy and track along which toy runs (1980-09-16),

8. 4152614 - Miniature electric motors and method for manufacturing rotors for the (1979-05-01),

9. 4146303 - Stereo-viewer and stereo-sheet to be used for the same (1979-03-27),

10. 4127785 - Miniature motor (1978-11-28),

11. 4121355 - Learning device (1978-10-24),

12. 4091427 - Electric control system for magnetic sheet recording and reproducing (1978-05-23),

13. D245369 - Audio-visual sheet player (1977-08-09),

14. 4020505 - Magnetic sheet player with an adjustable inclined magnetic head (1977-04-26),

15. 4002408 - System and device for overhead projection (1977-01-11),

Company Overview

Gakken Co., Ltd. is a prominent Japanese company based in Tokyo, specializing in educational materials and services. The organization develops a wide range of products, including textbooks, learning aids, and digital content aimed at enhancing educational experiences. Gakken is also involved in the production of various consumer goods and operates in the fields of publishing and media, contributing to both formal and informal education sectors. Its commitment to innovation and quality positions it as a key player in the educational landscape in Japan and beyond.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

15 Patents

#1,541 in Tokyo

#3,447 in Japan

#39,959 in the World

Gakken Co., Ltd.

Forward Citations = 103

20 inventors:

Fukuji Hachimura (3 out of 3 patents)

Shozo Ishiyama (2 out of 6 patents)

Masao Iwaoka (2 out of 2 patents)

4. Yosuke Igeta (2 out of 2 patents)

5. Fumio Kobayashi (2 out of 2 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Gakken Co., Ltd.. Retrieved from https://idiyas.com/company/gakken-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]

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