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Powdertech Co., Ltd.

USPTO Granted Patents = 94

% Expired Patents = 13.8

EPO Patents = 46

Trademarks = 3

Forward Citations = 161

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61 inventors (with patents filed for the assignee):

Koji Aga (32 out of 34 patents)

Takao Sugiura (21 out of 22 patents)

Hiromichi Kobayashi (21 out of 23 patents)

4. Yuji Sato (21 out of 23 patents)

5. Tetsuya Uemura (20 out of 21 patents)

6. Toshio Honjo (17 out of 17 patents)

7. Kanao Kayamoto (15 out of 15 patents)

8. Hiroki Sawamoto (13 out of 13 patents)

9. Takashi Kojima (12 out of 100 patents)

10. Makoto Ishikawa (11 out of 11 patents)

11. Tetsuya Igarashi (11 out of 14 patents)

12. Tsuyoshi Itagoshi (10 out of 11 patents)

13. Issei Shinmura (10 out of 10 patents)

14. Kazutaka Ishii (8 out of 8 patents)

15. Tomoyuki Suwa (7 out of 7 patents)

Core Competencies:

Electrophotographic Developer

Ferrite Particles

Resin Composition

Carrier Core Material

Magnetic Core Material

Mn Ferrite Powder

Iron Oxide Powder

Spherical Ferrite

Oxygen Detector

Electromagnetic Shielding

Carrier Production Method

Granulating Method

94 patents: Sort by Forward Citations

1. 12455516 - Ferrite particle, carrier core material for electrophotographic developer, carrier for electrophotographic developer, and electrophotographic developer (2025-10-28),

2. 12436480 - Ferrite particles, electrophotographic developer carrier core material, electrophotographic developer carrier, and electrophotographic developer (2025-10-07),

3. 12422763 - Ferrite particles, electrophotographic developer carrier core material, electrophotographic developer carrier, and electrophotographic developer (2025-09-23),

4. 12386281 - Ferrite particles, electrophotographic developer carrier core material, electrophotographic developer carrier, and electrophotographic developer (2025-08-12),

5. 12253825 - Ferrite particles, electrophotographic developer carrier core material, electrophotographic developer carrier, and electrophotographic developer (2025-03-18),

6. 12204280 - Carrier, xerographic developer, and carrier production method (2025-01-21),

7. 12134567 - Ferrite powder and method for producing same (2024-11-05),

8. 12119151 - Ferrite powder and method of producing the same (2024-10-15),

9. 11952286 - Mn ferrite powder, resin composition, electromagnetic wave shielding material, electronic material, and electronic component (2024-04-09),

10. 11651881 - Mn—Zn ferrite particles, resin molded body, soft magnetic mixed powder, and magnetic core (2023-05-16),

11. 11572926 - Iron oxide powder for brake friction material (2023-02-07),

12. 11542174 - Ferrite particles, resin compositions and electromagnetic wave shielding material (2023-01-03),

13. 11521768 - Ferrite powder, resin composition, and molded body (2022-12-06),

14. 11422480 - Ferrite carrier core material for electrophotographic developer, ferrite carrier, manufacturing method thereof, and electrophotographic developer using said ferrite (2022-08-23),

15. 11359689 - Iron oxide powder for brake friction material (2022-06-14),

POWDERTECH CO., LTD. specializes in providing high-quality powder coating solutions for a wide range of industries. With over 20 years of experience, we have established ourselves as a trusted leader in the powder coating industry. Our advanced technology and state-of-the-art facilities allow us to offer customized solutions tailored to meet each client's specific needs. From coatings for automotive parts to industrial machinery, our products ensure durable finishes, corrosion resistance, and enhanced aesthetics. Visit our website for more information and to explore our comprehensive range of powder coating solutions.

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

Company Badge

USPTO Data Jan 1 1976 - Sep 22 2026

Powdertech Co., Ltd.

94 Patents

#15 in Chiba

#1,165 in Japan

#8,171 in the World

Powdertech Co., Ltd.

Forward Citations = 161

61 inventors:

Koji Aga (32 out of 34 patents)

Takao Sugiura (21 out of 22 patents)

Hiromichi Kobayashi (21 out of 23 patents)

4. Yuji Sato (21 out of 23 patents)

5. Tetsuya Uemura (20 out of 21 patents)

Please report any incorrect information to [email protected]

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