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Sumitomo Metal Mining Company, Ltd.

USPTO Granted Patents = 898

CIPO Patents = 93

EPO Patents = 311

Trademarks = 8

Forward Citations = 2,676

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744 inventors (with patents filed for the assignee):

Kazuomi Ryoshi (54 out of 54 patents)

Masaya Yukinobu (48 out of 48 patents)

Yoshiyuki Abe (44 out of 66 patents)

4. Hiroyuki Toya (40 out of 40 patents)

5. Tokuyuki Nakayama (38 out of 39 patents)

6. Kensaku Mori (37 out of 59 patents)

7. Yoshitomo Ozaki (35 out of 35 patents)

8. Hiroshi Kobayashi (34 out of 39 patents)

9. Tetsufumi Komukai (32 out of 32 patents)

10. Haruki Kaneda (28 out of 28 patents)

11. Satoshi Asano (28 out of 30 patents)

12. Osamu Nakai (27 out of 28 patents)

13. Takeshi Chonan (26 out of 26 patents)

14. Hirofumi Tsunematsu (23 out of 23 patents)

15. Kenji Adachi (23 out of 47 patents)

Core Competencies:

Nickel Sulfate Solution

Slurry Processing

Magnetostrictive Member

Lithium Ion Secondary Battery

Optical Film

Positive Electrode Active Material

Non-Aqueous Electrolyte

Electromagnetic Wave Absorption

Infrared Absorbing Material

Thick Film Resistor

Composite Hydroxide

Bubble Measurement

898 patents: Sort by Forward Citations

1. 12500283 - Method for treating alloy (2025-12-16),

2. 12500233 - Positive electrode active material for lithium ion secondary battery and lithium ion secondary battery (2025-12-16),

3. 12494482 - Lithium metal composite oxide powder, positive electrode active material for lithium secondary batteries, positive electrode, and lithium secondary battery (2025-12-09),

4. 12473208 - Production method and production apparatus for nickel sulfate solution (2025-11-18),

5. 12465899 - Slurry processing apparatus, microbubble generation equipment, and slurry processing method (2025-11-11),

6. 12464952 - Magnetostrictive member and method for manufacturing magnetostrictive member (2025-11-04),

7. 12454465 - Nickel manganese cobalt composite hydroxide, method for producing nickel manganese cobalt composite hydroxide, lithium nickel manganese cobalt composite oxide, and lithium ion secondary battery (2025-10-28),

8. 12451483 - Metal composite hydroxide and method for producing same, positive electrode active material for non-aqueous electrolyte secondary battery and method for producing same, and non-aqueous electrolyte secondary battery (2025-10-21),

9. 12448325 - Optical film, sputtering target, and method of producing optical film (2025-10-21),

10. 12444740 - Cathode active material for lithium ion secondary battery and method for producing same (2025-10-14),

11. 12435223 - Dark powder dispersion liquid, dark powder dispersion body and colored layer-attached base material (2025-10-07),

12. 12431494 - Nickel manganese cobalt composite hydroxide, method for producing nickel manganese cobalt composite hydroxide, lithium nickel manganese cobalt composite oxide, and lithium ion secondary battery (2025-09-30),

13. 12418041 - Positive electrode active material for non-aqueous electrolyte secondary battery and method for manufacturing the same, positive electrode mixed material paste for non-aqueous electrolyte secondary battery, and non-aqueous electrolyte secondary battery (2025-09-16),

14. 12394794 - Positive electrode active material, high-temperature operation type lithium-ion polymer secondary battery, high-temperature operation type lithium ion inorganic all-solid-state secondary battery (2025-08-19),

15. 12388111 - Nonaqueous electrolyte secondary battery positive electrode active material and method for manufacturing same, and nonaqueous electrolyte secondary battery (2025-08-12),

Sumitomo Metal Mining Company, Ltd. is a leading global company in the non-ferrous metals industry. Headquartered in Tokyo, Japan, the company is engaged in diverse operations, including exploration, mining, smelting, refining, and manufacturing of various minerals and metals. Sumitomo Metal Mining is dedicated to sustainable development and innovation in order to meet the world's growing demand for natural resources. Visit their website for more information about their products, services, and commitment to environmental and social responsibility.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 30 2025

898 Patents

#110 in Tokyo

#241 in Japan

#1,101 in the World

Sumitomo Metal Mining Company, Ltd.

Forward Citations = 2,676

744 inventors:

Kazuomi Ryoshi (54 out of 54 patents)

Masaya Yukinobu (48 out of 48 patents)

Yoshiyuki Abe (44 out of 66 patents)

4. Hiroyuki Toya (40 out of 40 patents)

5. Tokuyuki Nakayama (38 out of 39 patents)

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