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For the Inventor, By the Inventor

Tokyo, Japan

Sansho Co., Ltd.


USPTO Granted Patents = 10


Forward Citations = 71

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26 inventors (with patents filed for the assignee):

goldMedal Mitsuhiro Yoshida (5 out of 5 patents)

silverMedal Yoshio Ishino (3 out of 5 patents)

bronzeMedal Hiroyuki Fujimori (3 out of 3 patents)

4.  Yutaka Morita (2 out of 11 patents)

5.  Shigemitsu Ohsawa (2 out of 4 patents)

6.  Masayoshi Kasai (2 out of 4 patents)

7.  Hideo Yamaguchi (2 out of 2 patents)

8.  Masahiro Kobayashi (2 out of 4 patents)

9.  Atsunobu Mizote (2 out of 2 patents)

10.  Yoshiyuki Iwamuro (2 out of 2 patents)

11.  Akira Sasaki (1 out of 85 patents)

12.  Hiroaki Yuasa (1 out of 7 patents)

13.  Hiroki Okazaki (1 out of 6 patents)

14.  Kimiko Murofushi (1 out of 4 patents)

15.  Ikuko Masuda (1 out of 1 patent)


10 patents:

1. 10774100 - Crystal of cyclic phosphonic acid sodium salt and method for manufacturing same (2020-09-15),
2. 9085593 - Therapeutic agent for arthrosis (2015-07-21),
3. 5252588 - Percutaneously absorbable crosslinked polyvinylpyrrolidone eperisone or (1993-10-12),
4. 5246949 - Preparation for endermism containing dopamine derivatives (1993-09-21),
5. 5073375 - Pharmaceutical preparation for percutaneous administration containing (1991-12-17),
6. 5059427 - Pharmaceutical preparation for percutaneous administration containing (1991-10-22),
7. 5041437 - Pharmaceutical preparation for percutaneous administration containing (1991-08-20),
8. 4230525 - Process for improving qualities of paper (1980-10-28),
9. 4224103 - Bonding composition for incombustible fibrous materials (1980-09-23),
10. 4092823 - Timepiece having display cylinders (1978-06-06),
Company Overview
Sansho Co., Ltd., based in Tokyo, specializes in the development and manufacturing of advanced industrial equipment and components. The company focuses on providing innovative solutions across various sectors, including automotive, electronics, and machinery. With a commitment to research and development, Sansho aims to enhance operational efficiency and product performance through cutting-edge technology. Its expertise in precision engineering and automation positions it as a key player in the competitive landscape of industrial manufacturing.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 13 2026

10 Patents

#1,914 in Tokyo

#4,401 in Japan

#56,047 in the World

Tokyo, JP
Tokyo, Japan

Sansho Co., Ltd.

Forward Citations = 71

26 inventors:

goldMedal Mitsuhiro Yoshida (5 out of 5 patents)

silverMedal Yoshio Ishino (3 out of 5 patents)

bronzeMedal Hiroyuki Fujimori (3 out of 3 patents)

4.  Yutaka Morita (2 out of 11 patents)

5.  Shigemitsu Ohsawa (2 out of 4 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Sansho Co., Ltd.. Retrieved from https://idiyas.com/company/sansho-company

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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