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Santoku Corporation

USPTO Granted Patents = 50

% Expired Patents = 26.0

EPO Patents = 21

Forward Citations = 65

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82 inventors (with patents filed for the assignee):

Tadatoshi Murota (11 out of 11 patents)

Takayuki Otsuki (7 out of 7 patents)

Motofumi Matsuda (5 out of 5 patents)

4. Hiroaki Takata (4 out of 4 patents)

5. Toshio Irie (4 out of 4 patents)

6. Kazumasa Shintani (4 out of 4 patents)

7. Bao-Min Ma (4 out of 4 patents)

8. Tatsuya Takeguchi (3 out of 7 patents)

9. Ryo Murakami (3 out of 17 patents)

10. Hiroki Hayashi (3 out of 3 patents)

11. Kazuhiko Yamamoto (3 out of 13 patents)

12. Qun Chen (3 out of 3 patents)

13. Yasutomo Matsumoto (2 out of 2 patents)

14. Takayuki Shimizu (2 out of 2 patents)

15. Shigeru Ono (2 out of 2 patents)

Core Competencies:

Hydrogen Storage

Rare Earth Magnets

Lithium-Ion Batteries

Composite Oxide

Magnetic Refrigeration

Positive Electrode

Negative Electrode

Hydrogen Absorption Alloy

Alloy Production

Fuel Cells

Battery Technology

Sintered Magnets

50 patents: Sort by Forward Citations

1. 12741866 - Hydrogen storage material, hydrogen storage container, and hydrogen supply apparatus (2026-09-22),

2. 12590355 - Hydrogen storage material, hydrogen storage container, and hydrogen supply apparatus (2026-03-31),

3. 12031197 - Hydrogen storage material, hydrogen storage container, and hydrogen supply apparatus (2024-07-09),

4. 11370949 - HoCu-based cold-storage material, and cold-storage device and refrigerating machine each equipped therewith (2022-06-28),

5. 11326228 - Method for separating rare earth element (2022-05-10),

6. 11145443 - R-T-B-based magnet material alloy and method for producing the same (2021-10-12),

7. 11084022 - Pd-supporting Zr-based composite oxide (2021-08-10),

8. 10741838 - Positive-electrode active material powder, positive electrode containing positive-electrode active material powder, and secondary battery (2020-08-11),

9. 10583488 - Manufacturing method for magnetic freezing module (2020-03-10),

10. 10547055 - Positive-electrode active material for nonaqueous-electrolyte secondary battery, and positive electrode and secondary battery using said positive-electrode active material (2020-01-28),

11. 10497497 - R-T-B—Ga-based magnet material alloy and method of producing the same (2019-12-03),

12. 10262779 - R-T-B-based magnet material alloy and method for producing the same (2019-04-16),

13. 10258964 - Composite oxide (2019-04-16),

14. 10256018 - Cast rare earth-containing alloy sheet, manufacturing method therefor, and sintered magnet (2019-04-09),

15. 10022793 - Alloy flake production apparatus and production method for raw material alloy flakes for rare earth magnet using the apparatus (2018-07-17),

Company Overview

Santoku Corporation, headquartered in Hyogo, Japan, specializes in advanced hydrogen storage materials and technologies. The company focuses on the development and manufacturing of innovative solutions in hydrogen storage, rare earth magnets, and lithium-ion batteries. Its expertise extends to composite oxides and magnetic refrigeration, contributing to the advancement of energy storage and efficiency. Santoku's commitment to research in positive and negative electrodes and hydrogen absorption alloys positions it as a key player in the evolving landscape of sustainable energy technologies.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

50 Patents

#27 in Hyogo

#1,711 in Japan

#14,024 in the World

Santoku Corporation

Forward Citations = 65

82 inventors:

Tadatoshi Murota (11 out of 11 patents)

Takayuki Otsuki (7 out of 7 patents)

Motofumi Matsuda (5 out of 5 patents)

4. Hiroaki Takata (4 out of 4 patents)

5. Toshio Irie (4 out of 4 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Santoku Corporation. Retrieved from https://idiyas.com/company/santoku

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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