For the Inventor, By the Inventor

Enter assignee name

Riso Kagaku Corporation

USPTO Granted Patents = 1,086

% Expired Patents = 16.7

EPO Patents = 125

Trademarks = 19

Forward Citations = 3,893

Loading Chart...

Loading Chart...

567 inventors (with patents filed for the assignee):

Takanori Hasegawa (38 out of 38 patents)

Sadanao Okuda (29 out of 29 patents)

Shinichiro Shimura (23 out of 23 patents)

4. Hiroshi Sugitani (23 out of 23 patents)

5. Yoshiyuki Okada (23 out of 24 patents)

6. Masashi Hara (23 out of 24 patents)

7. Yoshikazu Hara (23 out of 24 patents)

8. Toshihiro Endo (22 out of 22 patents)

9. Yoshifumi Watanabe (21 out of 21 patents)

10. Hideo Watanabe (21 out of 81 patents)

11. Katsuro Motoe (20 out of 20 patents)

12. Yasuhiro Takahashi (19 out of 84 patents)

13. Kazuyuki Ando (19 out of 19 patents)

14. Akiko Hayashi (17 out of 19 patents)

15. Jun Nakamura (17 out of 34 patents)

Core Competencies:

Inkjet Printer

Aqueous Ink

Droplet Ejection

Medium Feeding

Textile Printing

Oil-Based Ink

Printing Apparatus

Image Inspection

Liquid Supply

Conveying Apparatus

Agitation Device

Transportation Apparatus

1,086 patents: Sort by Forward Citations

1. 12759804 - Conveyance device (2026-10-13),

2. 12735286 - Sheet conveyance device (2026-09-15),

3. 12691696 - Conveying device (2026-07-28),

4. 12676827 - Communication system (2026-07-07),

5. 12654453 - Inkjet printer (2026-06-16),

6. 12649860 - Treatment liquid, inkjet ink set, and method for producing printed matter (2026-06-09),

7. 12630380 - Roller pair for conveying sheets and printing apparatus (2026-05-19),

8. 12583705 - Medium loading device (2026-03-24),

9. 12583246 - Printing apparatus and method for forming printed images having glossiness (2026-03-24),

10. 12571159 - Aqueous ink for textile inkjet printing and method for producing printed textile item (2026-03-10),

11. 12545025 - Droplet ejection control apparatus (2026-02-10),

12. 12531868 - Communication system, manager apparatus, communication method, and communication program (2026-01-20),

13. 12456228 - Information processing apparatus, information processing method, and non-transitory computer-readable storage medium storing information processing program (2025-10-28),

14. D1096705 - Wireless communication tag (2025-10-07),

15. 12437545 - Method, apparatus, and program for processing video information (2025-10-07),

Company Overview

Riso Kagaku Corporation, headquartered in Tokyo, Japan, specializes in inkjet printing technology, focusing on the development and manufacturing of high-performance inkjet printers and related products. The company is recognized for its innovations in aqueous and oil-based inks, droplet ejection mechanisms, and medium feeding systems, catering to diverse applications including textile printing. Riso's commitment to advancing printing technology positions it as a key player in the global printing industry.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

1,086 Patents

#108 in Tokyo

#212 in Japan

#941 in the World

Riso Kagaku Corporation

Forward Citations = 3,893

567 inventors:

Takanori Hasegawa (38 out of 38 patents)

Sadanao Okuda (29 out of 29 patents)

Shinichiro Shimura (23 out of 23 patents)

4. Hiroshi Sugitani (23 out of 23 patents)

5. Yoshiyuki Okada (23 out of 24 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Riso Kagaku Corporation. Retrieved from https://idiyas.com/company/riso-kagaku

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]

Loading…