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Sumitomo Corporation

USPTO Granted Patents = 22

% Expired Patents = 27.3

EPO Patents = 5

Trademarks = 6

Forward Citations = 82

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61 inventors (with patents filed for the assignee):

Hironori Kawamura (4 out of 5 patents)

Masanobu Kawata (3 out of 3 patents)

Kohei Mitsuhashi (3 out of 4 patents)

4. Ikuo Moriyama (3 out of 3 patents)

5. Shigeru Matsuo (2 out of 6 patents)

6. Koji Kajiwara (2 out of 3 patents)

7. Yutaka Yamaguchi (2 out of 23 patents)

8. Atsushi Moriya (2 out of 3 patents)

9. Ryo Kawarabuki (2 out of 2 patents)

10. Kenji Sonomoto (2 out of 2 patents)

11. Takahito Ohkubo (2 out of 2 patents)

12. Toshihiro Tanaka (2 out of 2 patents)

13. Nobuyoshi Oike (2 out of 2 patents)

14. Motoo Yoshioka (2 out of 2 patents)

15. Teruyuki Tatsumi (2 out of 3 patents)

22 patents: Sort by Forward Citations

1. 11685597 - Bag material and crushed stone placement method using bag material (2023-06-27),

2. 11332902 - Scour prevention unit and scour prevention method (2022-05-17),

3. 10035710 - Method for producing lithium carbonate (2018-07-31),

4. 9255011 - Method for producing lithium carbonate (2016-02-09),

5. 9234219 - Method for producing L-lactic acid by lactic acid bacterium under presence of pentose and cellooligosaccharides (2016-01-12),

6. 9228569 - Method for constructing a foundation for a wind power generation system (2016-01-05),

7. 8920763 - Method for producing lithium carbonate (2014-12-30),

8. 8853282 - Topical liquid insecticide compositions (2014-10-07),

9. 8850787 - Hybrid thermal power generation system and method of constructing same (2014-10-07),

10. 8657529 - Method for planarizing unevenness of the seabed (2014-02-25),

11. 8420359 - Method of producing butanol (2013-04-16),

12. 7211298 - Electrostatically fiber planted steel sheet and production process therefor (2007-05-01),

13. 7097711 - Electrostatic flocking chamber for forming electrostatic flocking apparatus (2006-08-29),

14. 7069252 - Electronic transaction server, client for seller, client for buyer and electronic transaction method (2006-06-27),

15. 6302922 - Process for manufacturing woven or knit fabrics having excellent shrink and crease resistance and shape stability by using sericin fixed yarns of raw silks and the woven or knit fabrics manufactured by the same process (2001-10-16),

Sumitomo Corporation is a diversified global trading and investment company headquartered in Tokyo, Japan. The organization engages in a wide range of sectors, including metal products, transportation and construction systems, infrastructure, and chemicals. It specializes in developing innovative solutions and technologies across various industries, with a strong emphasis on sustainability and social responsibility. Sumitomo Corporation operates internationally, leveraging its extensive network to facilitate trade and investment opportunities worldwide.

Profile summary based on public USPTO records.

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USPTO Data Jan 1 1976 - Sep 29 2026

Sumitomo Corporation

22 Patents

#1,285 in Tokyo

#2,792 in Japan

#28,741 in the World

Sumitomo Corporation

Forward Citations = 82

61 inventors:

Hironori Kawamura (4 out of 5 patents)

Masanobu Kawata (3 out of 3 patents)

Kohei Mitsuhashi (3 out of 4 patents)

4. Ikuo Moriyama (3 out of 3 patents)

5. Shigeru Matsuo (2 out of 6 patents)

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