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Mitsui Minings & Melting Co., Ltd.

USPTO Granted Patents = 817

% Expired Patents = 26.6

CIPO Patents = 5

EPO Patents = 150

Trademarks = 13

Forward Citations = 4,363

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901 inventors (with patents filed for the assignee):

Yoshinori Matsuura (34 out of 37 patents)

Shinya Kagei (34 out of 34 patents)

Yunosuke Nakahara (29 out of 29 patents)

4. Takao Hayashi (25 out of 29 patents)

5. Toshimi Nakamura (24 out of 26 patents)

6. Yoshimi Hata (22 out of 22 patents)

7. Makoto Dobashi (21 out of 22 patents)

8. Tetsuro Sato (21 out of 21 patents)

9. Kiyoshi Yamagishi (21 out of 21 patents)

10. Atsushi Koike (19 out of 60 patents)

11. Toshifumi Matsushima (16 out of 16 patents)

12. Tetsuya Mitsumoto (16 out of 18 patents)

13. Yutaka Hirasawa (16 out of 17 patents)

14. Naotomi Takahashi (16 out of 16 patents)

15. Kazuo Moriya (16 out of 17 patents)

Core Competencies:

Solid Electrolyte

Gas Sensor

Exhaust Gas Purification

Electrode Catalyst

Copper Foil

Printed Wiring Board

Sulfide-Based Electrolyte

Composite Material

Bonding Composition

Pharmaceutical Composition

Tantalate Compound

Hydrocarbon Adsorbent

817 patents: Sort by Forward Citations

1. 12480909 - Solid electrolyte, electrochemical element, and limiting current type gas sensor (2025-11-25),

2. 12480905 - Gas concentration measuring device and method for measuring concentration of analyte gas in sample gas (2025-11-25),

3. 12473207 - Tantalate dispersion and tantalate compound (2025-11-18),

4. 12472206 - Pharmaceutical composition containing cerium compound as active ingredient (2025-11-18),

5. 12465908 - Exhaust gas purification catalyst (2025-11-11),

6. 12457686 - Roughened copper foil, copper-cladded laminate board, and printed wiring board (2025-10-28),

7. 12431533 - Solid electrolyte, and electrode mixture, solid electrolyte layer and solid-state battery, each using same (2025-09-30),

8. 12424656 - Solid electrolyte, and electrode mixture, solid electrolyte layer and solid-state battery, each using same (2025-09-23),

9. 12424626 - Composite material, and method for manufacturing same (2025-09-23),

10. 12407012 - Solid electrolyte assembly having intermediate layer (2025-09-02),

11. 12399001 - Method for measuring surface parameter of copper foil, and method for sorting copper foil (2025-08-26),

12. 12397345 - Powder for film formation or sintering (2025-08-26),

13. 12374682 - Active material and process for producing the same (2025-07-29),

14. 12365025 - Fine metal linear body (2025-07-22),

15. 12354764 - Silver powder, method for producing same, and conductive resin composition (2025-07-08),

Mitsui Minings & Melting Co., Ltd. is a leading Japanese company engaged in the mining and processing of minerals, particularly focusing on non-ferrous metals. Established in the late 19th century, the company has a rich history and has evolved to become a key player in the global mining industry. Mitsui Minings & Melting is involved in various activities, including the extraction of copper, gold, and other valuable minerals, as well as the production of refined metals. The company emphasizes sustainable practices and innovation in its operations, contributing to the development of advanced technologies in the mining sector.

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

Company Badge

USPTO Data Jan 1 1976 - Sep 8 2026

817 Patents

#128 in Tokyo

#261 in Japan

#1,230 in the World

Mitsui Minings & Melting Co., Ltd.

Forward Citations = 4,363

901 inventors:

Yoshinori Matsuura (34 out of 37 patents)

Shinya Kagei (34 out of 34 patents)

Yunosuke Nakahara (29 out of 29 patents)

4. Takao Hayashi (25 out of 29 patents)

5. Toshimi Nakamura (24 out of 26 patents)

Please report any incorrect information to [email protected]

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