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Sanraku Incorporated

USPTO Granted Patents = 21

Forward Citations = 188

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47 inventors (with patents filed for the assignee):

Tomoyuki Ishikura (13 out of 31 patents)

Takeo Yoshioka (9 out of 41 patents)

Tomio Takeuchi (8 out of 186 patents)

4. Rokuro Okamoto (8 out of 20 patents)

5. Tsutomu Sawa (6 out of 13 patents)

6. Akihiro Yoshimoto (6 out of 13 patents)

7. Yasuo Fukagawa (6 out of 14 patents)

8. Hiroshi Tone (5 out of 13 patents)

9. Azuma Watanabe (5 out of 5 patents)

10. Osamu Jodo (4 out of 4 patents)

11. Yoshio Watanabe (4 out of 6 patents)

12. Hamao Umezawa (4 out of 203 patents)

13. Noritaka Chida (3 out of 3 patents)

14. Naoto Kawamura (2 out of 7 patents)

15. Kazuhiko Okamura (2 out of 4 patents)

21 patents: Sort by Forward Citations

1. 5240849 - DNA coding for enzyme capable of acylating the 4'-position of macrolide (1993-08-31),

2. 5091370 - Angolamycin derivatives (1992-02-25),

3. 5055259 - Bloodless blood typing training kit (1991-10-08),

4. 4997922 - Anthracycline derivatives (1991-03-05),

5. 4996314 - 6-(disubstituted amino)carbapenem compounds (1991-02-26),

6. 4994281 - Polylactic acid microspheres and process for producing the same (1991-02-19),

7. 4954438 - Process for preparing antibiotics D788-7 (1990-09-04),

8. 4939248 - Optically active azetidinones (1990-07-03),

9. 4933439 - Tylosin derivatives and processes for producing the same (1990-06-12),

10. 4918172 - Anthracycline antibiotics (1990-04-17),

11. 4918005 - Method of quantitative assay for vitamin B.sub.12 and reagent for (1990-04-17),

12. 4897470 - Anthracycline antibiotics DCP-1 and 2 (1990-01-30),

13. 4853407 - Aminoethylcysteine derivatives (1989-08-01),

14. 4812563 - 6-(disubstituted amino)carbapenam compounds (1989-03-14),

15. 4781977 - Cyclodextrin adsorbing-material (1988-11-01),

Company Overview

Sanraku Incorporated is a Tokyo-based company specializing in advanced technology solutions, particularly in the fields of software development and system integration. The organization focuses on creating innovative applications and platforms that enhance operational efficiency across various industries. With a commitment to research and development, Sanraku aims to leverage cutting-edge technologies to address complex challenges and drive digital transformation for its clients, both domestically and internationally.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

21 Patents

#1,310 in Tokyo

#2,862 in Japan

#29,961 in the World

Sanraku Incorporated

Forward Citations = 188

47 inventors:

Tomoyuki Ishikura (13 out of 31 patents)

Takeo Yoshioka (9 out of 41 patents)

Tomio Takeuchi (8 out of 186 patents)

4. Rokuro Okamoto (8 out of 20 patents)

5. Tsutomu Sawa (6 out of 13 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Sanraku Incorporated. Retrieved from https://idiyas.com/company/sanraku

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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