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For the Inventor, By the Inventor

Tokyo, Japan

Ricoh Company, Ltd.


USPTO Granted Patents = 28,951

% Expired Patents = 37.4



Trademarks = 70

Forward Citations = 231,611

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10,139 inventors (with patents filed for the assignee):

goldMedal Tetsuro Motoyama (250 out of 264 patents)

silverMedal Hiroshi Yoshinaga (227 out of 228 patents)

bronzeMedal Jonathan J Hull (208 out of 233 patents)

4.  Kenji Ishii (170 out of 257 patents)

5.  Masaomi Sasaki (168 out of 170 patents)

6.  Toshihiko Shimokawa (143 out of 147 patents)

7.  Jamey Graham (142 out of 145 patents)

8.  Takamasa Hase (135 out of 135 patents)

9.  Yoshinaga Kato (132 out of 132 patents)

10.  Tomoyuki Shimada (130 out of 132 patents)

11.  Takahiro Asai (129 out of 225 patents)

12.  Takahiro Imada (129 out of 129 patents)

13.  Naoki Iwaya (126 out of 126 patents)

14.  Yutaka Ikebuchi (124 out of 124 patents)

15.  Shunichi Sato (124 out of 125 patents)


Core Competencies:
Image Forming Apparatus
Liquid Discharge Head
Toner Production
Information Processing
Communication System
Measurement Device
Heating Device
Sheet Laminator
Wireless Sensing
Photoelectric Conversion
Packaging System
Developing Device

28,951 patents:

1. 12771801 - Information processing apparatus, information processing method, and non-transitory recording medium (2026-10-20),
2. 12770641 - Information processing apparatus, information input support system, and non-transitory recording medium (2026-10-20),
3. 12769754 - Cloud-based data management for data files (2026-10-20),
4. 12769232 - Image forming apparatus including a cover with a pressing portion having an inclined portion (2026-10-20),
5. 12769224 - Cleaning device, process cartridge, and image forming apparatus (2026-10-20),
6. 12767847 - Processing fluid, set of processing fluid and ink, applying device, image forming device, applying method, and image forming method (2026-10-20),
7. 12767815 - Resin particles, method of producing resin particles, toner, toner storage unit, and image forming apparatus (2026-10-20),
8. 12766859 - Medium detector and image forming apparatus (2026-10-20),
9. 12766853 - Liquid discharge apparatus and printing method (2026-10-20),
10. 12766831 - Drive controller, head device, and liquid discharge apparatus (2026-10-20),
11. 12766075 - Medication assistance device (2026-10-20),
12. 12761590 - Heating device including thermal conductor having arm and projection, fixing device, and image forming apparatus (2026-10-13),
13. 12761317 - Information processing system, information processing device, and information processing method (2026-10-13),
14. 12759826 - Sheet conveyor and image forming apparatus (2026-10-13),
15. 12759825 - Conveyor and image forming apparatus (2026-10-13),
Company Overview
Ricoh Company, Ltd., headquartered in Tokyo, Japan, is a global leader in image formation technology. The company specializes in developing and manufacturing advanced image forming apparatus, including printers and multifunction devices, as well as innovative solutions in toner production and liquid discharge head technology. Ricoh also focuses on information processing, communication systems, measurement devices, heating devices, and sheet laminators, contributing to a wide range of industries and enhancing productivity through its cutting-edge technologies.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 20 2026

Ricoh Company, Ltd. USPTO Patent Assignee Logo
28,951 Patents

#6 in Tokyo

#9 in Japan

#25 in the World

Tokyo, JP
Tokyo, Japan

Ricoh Company, Ltd.

Forward Citations = 231,611

10,139 inventors:

goldMedal Tetsuro Motoyama (250 out of 264 patents)

silverMedal Hiroshi Yoshinaga (227 out of 228 patents)

bronzeMedal Jonathan J Hull (208 out of 233 patents)

4.  Kenji Ishii (170 out of 257 patents)

5.  Masaomi Sasaki (168 out of 170 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Ricoh Company, Ltd.. Retrieved from https://idiyas.com/company/ricoh-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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