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For the Inventor, By the Inventor

Mizuho, Japan

Sanko Co., Ltd.


USPTO Granted Patents = 31

% Expired Patents = 12.9



Trademarks = 3

Forward Citations = 184

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42 inventors (with patents filed for the assignee):

goldMedal Hisatoshi Yamauchi (6 out of 6 patents)

silverMedal Akihiko Yoshizato (3 out of 6 patents)

bronzeMedal Yoshito Nakagawa (3 out of 3 patents)

4.  Shigeru Oda (3 out of 12 patents)

5.  Yoshimi Ishibashi (2 out of 2 patents)

6.  Ryoichi Kinishi (2 out of 2 patents)

7.  Naoki Komiya (2 out of 2 patents)

8.  Kazuhiko Miyata (2 out of 2 patents)

9.  Daishiro Kishimoto (2 out of 8 patents)

10.  Fukashi Urakami (2 out of 2 patents)

11.  Tomio Kimura (1 out of 43 patents)

12.  Akira Inoue (1 out of 129 patents)

13.  Hiroyuki Tano (1 out of 1 patent)

14.  Hidetsugu Nakai (1 out of 1 patent)

15.  Tetsushi Katsube (1 out of 12 patents)


Core Competencies:
Polyurethane Elastic Fiber
Thermosensitive Recording Material
Flame Retardant Epoxy Resin
Cleaning Brush
Folding Container
Container Assembly
Sensitizer Particle Dispersion
High Melting Point Flame Retardant
Power Supply Regulating Apparatus
Collapsible Container
Pallet Structure
Epoxy Resin Composition

31 patents:

1. 11945769 - N,N′-diarylurea derivative, manufacturing method thereof, and thermosensitive recording material using same (2024-04-02),
2. 11618979 - Method for producing polyurethane elastic fiber (2023-04-04),
3. 11105020 - Polyurethane elastic fiber and method for producing polyurethane elastic fiber (2021-08-31),
4. 10975240 - Method for producing antioxidant and method for producing elastic polyurethane fiber (2021-04-13),
5. 10301069 - Container (2019-05-28),
6. 10086634 - Heat-sensitive recording material (2018-10-02),
7. 9586720 - Pallet structure (2017-03-07),
8. 9394398 - Phosphorus-containing flame retardant epoxy resin (2016-07-19),
9. 9375966 - Sensitizer particle dispersion for thermosensitive recording medium composed mainly of stearic acid amide, preparation method thereof, mixed dispersion composition for thermosensitive recording layer, and thermosensitive recording medium (2016-06-28),
10. 9371438 - High melting point flame retardant crystal and method for manufacturing the same, epoxy resin composition containing the flame retardant, and prepreg and flame retardant laminate using the composition (2016-06-21),
11. 9242761 - Box pallet side wall (2016-01-26),
12. 9102696 - Phosphorus-based (meth)acrylate compound and method of preparing the same (2015-08-11),
13. 8997982 - Container (2015-04-07),
14. 8851288 - Collapsible container (2014-10-07),
15. 8794464 - Assemblable and disassemblable container (2014-08-05),
Company Overview
Sanko Co., Ltd. is a Japanese company headquartered in Mizuho, specializing in the development and manufacturing of advanced industrial equipment and systems. The organization focuses on innovative solutions across various sectors, including automation technology, precision machinery, and environmental systems. With a commitment to enhancing operational efficiency and sustainability, Sanko leverages its expertise to address the evolving needs of industries both domestically and internationally.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 13 2026

31 Patents

#1 in Mizuho

#2,271 in Japan

#21,260 in the World

Mizuho, JP
Mizuho, Japan

Sanko Co., Ltd.

Forward Citations = 184

42 inventors:

goldMedal Hisatoshi Yamauchi (6 out of 6 patents)

silverMedal Akihiko Yoshizato (3 out of 6 patents)

bronzeMedal Yoshito Nakagawa (3 out of 3 patents)

4.  Shigeru Oda (3 out of 12 patents)

5.  Yoshimi Ishibashi (2 out of 2 patents)

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