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Kotobuki Seiyaku Co. Ltd.

USPTO Granted Patents = 23

Forward Citations = 39

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23 inventors (with patents filed for the assignee):

Tsuyoshi Tomiyama (23 out of 30 patents)

Akira Tomiyama (17 out of 22 patents)

Takashi Yanagisawa (5 out of 6 patents)

4. Naoto Ueyama (4 out of 9 patents)

5. Tomoyuki Kawai (4 out of 4 patents)

6. Koichi Kubota (4 out of 4 patents)

7. Motoharu Sonegawa (3 out of 5 patents)

8. Shuuichi Wakabayashi (3 out of 3 patents)

9. Masayuki Yokota (3 out of 3 patents)

10. Tadashi Shirai (2 out of 2 patents)

11. Masafumi Yasunami (2 out of 2 patents)

12. Hiromi Baba (2 out of 2 patents)

13. Yoshinori Kobayashi (1 out of 46 patents)

14. Atsushi Noda (1 out of 31 patents)

15. Shuichi Wakabayshi (1 out of 1 patent)

23 patents: Sort by Forward Citations

1. 5990158 - Carboxylic acid derivatives, method of manufacturing the same and (1999-11-23),

2. 5843999 - 2-phenylazulene derivatives and a manufacturing method of these compounds (1998-12-01),

3. 5527815 - Carboxymethylidenecycloheptimidazole derivatives, method of (1996-06-18),

4. 5409947 - Cycloheptimidazole derivatives, method of manufacturing the same and (1995-04-25),

5. 5274000 - Benzofuran and benzothiophene derivatives, anti-hyperuricemia agents (1993-12-28),

6. 5240944 - Cyclic guanidine derivatives, anti-ulceratives and method of (1993-08-31),

7. 5175184 - Benzothiophene derivatives and antihyperuricemia thereof (1992-12-29),

8. 5081152 - Azulene derivatives as thromboxane A.sub.2 and prostaglandin (1992-01-14),

9. 5008282 - Cyclic guanidine derivatives, anti-ulceratives and methods of (1991-04-16),

10. 5004750 - Benzofuran and benzothoiphene derivatives, of tetrazole and (1991-04-02),

11. 4978674 - Daimine derivatives, and method of manufacturing the same (1990-12-18),

12. 4797415 - Benzofuran derivatives and use thereof for treating hyperuricemia (1989-01-10),

13. 4749705 - Quinazoline derivative and anti-hypertensive agents (1988-06-07),

14. 4735955 - 2-substituted cycloheptoimidazole derivatives and anti-ulcerative agents (1988-04-05),

15. 4730060 - Carbacyclin derivatives, method of manufacturing the same and (1988-03-08),

Kotobuki Seiyaku Co. Ltd. specializes in the research, development, and manufacturing of pharmaceutical products. With a focus on innovation and quality, the company has built a strong reputation in the industry. Established in Japan, Kotobuki Seiyaku Co. Ltd. has expanded its reach globally, serving customers around the world with a wide range of high-quality medications.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Jan 6 2026

23 Patents

#32 in Nagano

#2,646 in Japan

#26,841 in the World

Kotobuki Seiyaku Co. Ltd.

Forward Citations = 39

23 inventors:

Tsuyoshi Tomiyama (23 out of 30 patents)

Akira Tomiyama (17 out of 22 patents)

Takashi Yanagisawa (5 out of 6 patents)

4. Naoto Ueyama (4 out of 9 patents)

5. Tomoyuki Kawai (4 out of 4 patents)

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