For the Inventor, By the Inventor

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Dowa Eco-System Co., Ltd.

USPTO Granted Patents = 5

Forward Citations = 0

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11 inventors (with patents filed for the assignee):

Ryoei Watanabe (5 out of 9 patents)

Chihiro Nishikawa (5 out of 11 patents)

Masataka Yamashita (5 out of 5 patents)

4. Yoshihiro Honma (5 out of 5 patents)

5. Yoshiki Ito (2 out of 2 patents)

6. Yoji Suganuma (1 out of 4 patents)

7. Tomotaka Izumi (1 out of 1 patent)

8. Youichi Fukuchi (1 out of 1 patent)

9. Yoshitaka Yoshiwara (1 out of 1 patent)

10. Hiroki Nagahara (1 out of 1 patent)

11. Minoru Yoshihara (1 out of 1 patent)

5 patents: Sort by Forward Citations

1. 12744261 - Method for recovering lithium and method for processing lithium ion secondary battery (2026-09-22),

2. 12735767 - Method for recovering valuable substance (2026-09-15),

3. 12716112 - Method for recovering valuable substance (2026-08-25),

4. 12706333 - Valuable matter recovery method (2026-08-11),

5. 12649960 - Method for recovering valuable substance (2026-06-09),

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USPTO Data Jan 1 1976 - Sep 22 2026

5 Patents

#2,717 in Tokyo

#6,647 in Japan

Dowa Eco-System Co., Ltd.

Forward Citations = 0

11 inventors:

Ryoei Watanabe (5 out of 9 patents)

Chihiro Nishikawa (5 out of 11 patents)

Masataka Yamashita (5 out of 5 patents)

4. Yoshihiro Honma (5 out of 5 patents)

5. Yoshiki Ito (2 out of 2 patents)

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