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Epson Corporation

Calculating rank

USPTO Granted Patents = 80

% Expired Patents = 1.3

Forward Citations = 1,674

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66 inventors (with patents filed for the assignee):

Haruhiko Koto (11 out of 16 patents)

Hiroyuki Akazawa (6 out of 10 patents)

Masaki Kurihara (6 out of 8 patents)

4. Hiroshi Ishii (4 out of 15 patents)

5. Junichi Okada (4 out of 6 patents)

6. Hitoshi Fujiwara (3 out of 15 patents)

7. Kenichiro Arai (3 out of 27 patents)

8. Masahiko Mori (3 out of 9 patents)

9. Yoshifumi Gomi (3 out of 11 patents)

10. Seiichi Hirano (3 out of 3 patents)

11. Kenji Sawada (3 out of 4 patents)

12. Masahiko Mizuno (3 out of 3 patents)

13. Naoyuki Maruyama (3 out of 3 patents)

14. Yoshinori Miyazawa (2 out of 46 patents)

15. Masanao Matsuzawa (2 out of 25 patents)

Core Competencies:

Ink Jet Printer

Print Head

Recording Apparatus

Liquid Crystal Display

Thermal Printer

Serial Printer

Electronic Printer

Compressor Controller

Modem

Paper Feeding Mechanism

Automotive Instrument Panel

Calculator

80 patents: Sort by Forward Citations

1. 6674423 - Drive unit and liquid crystal device (2004-01-06),

2. 5518373 - Compressor start-up controller (1996-05-21),

3. 5263183 - Radio antenna tuning circuit (1993-11-16),

4. 4806955 - Ink jet printer of the ink-on-demand type (1989-02-21),

5. D291442 - Computer (1987-08-18),

6. 4617581 - Ink jet printer of the ink-on-demand type (1986-10-14),

7. D284869 - Electronic calculator (1986-07-29),

8. 4597635 - Liquid crystal display device and a method of manufacturing the same (1986-07-01),

9. 4589000 - Ink jet printer of the ink-on-demand type (1986-05-13),

10. 4579468 - Wire dot printer utilizing multicolor inks (1986-04-01),

11. 4577931 - Liquid crystal composition (1986-03-25),

12. 4577203 - Ink jet recording apparatus (1986-03-18),

13. D282844 - Personal computer (1986-03-04),

14. D282843 - Portable electronic computer (1986-03-04),

15. 4572681 - Wire dot print head (1986-02-25),

Company Overview

Epson Corporation, headquartered in Nagano, Japan, is a leading innovator in the field of ink jet printing technology. The company specializes in the development and manufacturing of a wide range of printing solutions, including ink jet printers, print heads, and various recording apparatuses. In addition to its core printing technologies, Epson also explores advancements in liquid crystal displays, thermal and serial printers, and electronic printing systems. The organization is committed to enhancing productivity and sustainability through its innovative products and solutions.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 27 2026

80 Patents

#19 in Nagano

#1,308 in Japan

#9,466 in the World

Epson Corporation

Forward Citations = 1,674

66 inventors:

Haruhiko Koto (11 out of 16 patents)

Hiroyuki Akazawa (6 out of 10 patents)

Masaki Kurihara (6 out of 8 patents)

4. Hiroshi Ishii (4 out of 15 patents)

5. Junichi Okada (4 out of 6 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Epson Corporation. Retrieved from https://idiyas.com/company/epson

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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