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Dowa Electronics Materials Co., Ltd.

USPTO Granted Patents = 315

EPO Patents = 125

Trademarks = 2

Forward Citations = 542

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245 inventors (with patents filed for the assignee):

Kenji Sakane (28 out of 37 patents)

Akira Nagatomi (27 out of 38 patents)

Tetsuya Ikuta (25 out of 25 patents)

4. Masahiro Gotoh (23 out of 28 patents)

5. Toshihiko Ueyama (23 out of 26 patents)

6. Yoshitaka Kadowaki (22 out of 22 patents)

7. Kimitaka Sato (22 out of 28 patents)

8. Ryuichi Toba (17 out of 22 patents)

9. Yasuhiro Watanabe (16 out of 110 patents)

10. Shin-ichi Ohkoshi (15 out of 27 patents)

11. Shuji Yamashita (15 out of 22 patents)

12. Kenichi Inoue (14 out of 47 patents)

13. Keiichi Endoh (14 out of 14 patents)

14. Takeshi Kawauchi (14 out of 14 patents)

15. Tomohiko Shibata (14 out of 67 patents)

Core Competencies:

GaAs Wafer

Semiconductor Optical Device

Light-Emitting Diode

Deep Ultraviolet Light-Emitting Element

Silver Powder

III-Nitride Semiconductor

Magnetic Powder

Conductive Paste

Electrophotographic Developer

Copper Powder

Spherical Silver Powder

Composite Oxide Powder

315 patents: Sort by Forward Citations

1. 12507504 - Group III nitride semiconductor light-emitting element and method of manufacturing same (2025-12-23),

2. 12467160 - GaAs wafer and method of producing GaAs ingot (2025-11-11),

3. 12433066 - Semiconductor optical device and method of producing the same (2025-09-30),

4. 12427570 - Silver flake powder and production method thereof, and electrically conductive paste (2025-09-30),

5. 12426409 - Point source type light-emitting diode and manufacturing method thereof (2025-09-23),

6. 12402448 - Method of producing reflective electrode for deep ultraviolet light-emitting element, method of producing deep ultraviolet light-emitting element, and deep ultraviolet light-emitting element (2025-08-26),

7. 12390854 - Silver powder, method of producing silver powder, and conductive paste (2025-08-19),

8. 12349473 - Ultraviolet light receiving device (2025-07-01),

9. 12336335 - Light-emitting element and method of producing the same (2025-06-17),

10. 12300410 - Hexagonal ferrite magnetic powder and method for producing same (2025-05-13),

11. 12296382 - Method for producing silver powder (2025-05-13),

12. 12268038 - Group III nitride semiconductor light emitting element and method of manufacturing the same (2025-04-01),

13. 12198829 - Silver powder and method for producing same (2025-01-14),

14. 12194541 - Method for producing silver powder (2025-01-14),

15. 12125702 - Semiconductor light-emitting element and method of producing the same (2024-10-22),

DOWA ELECTRONICS MATERIALS CO., LTD. is a leading provider of materials and solutions for the electronics industry. With a strong focus on research and development, the company offers a wide range of products including sputtering targets, high purity metals, compound semiconductors, and thin films for various applications. DOWA Electronics Materials is committed to innovation, quality, and sustainability, catering to the needs of customers worldwide.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 30 2025

315 Patents

#239 in Tokyo

#509 in Japan

#2,771 in the World

Dowa Electronics Materials Co., Ltd.

Forward Citations = 542

245 inventors:

Kenji Sakane (28 out of 37 patents)

Akira Nagatomi (27 out of 38 patents)

Tetsuya Ikuta (25 out of 25 patents)

4. Masahiro Gotoh (23 out of 28 patents)

5. Toshihiko Ueyama (23 out of 26 patents)

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