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Ferrotec Corporation

USPTO Granted Patents = 24

% Expired Patents = 8.3

CIPO Patents = 1

EPO Patents = 19

Trademarks = 2

Forward Citations = 133

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27 inventors (with patents filed for the assignee):

Shiro Tsuda (11 out of 13 patents)

Yuichi Shiina (5 out of 5 patents)

Yasutake Hirota (2 out of 2 patents)

4. Takayuki Hachida (2 out of 2 patents)

5. Lucian Borduz (2 out of 4 patents)

6. Heiichi Unozawa (2 out of 3 patents)

7. Stefan Borduz (2 out of 3 patents)

8. Mayumi Takayama (2 out of 2 patents)

9. Charles D Hoyt (2 out of 6 patents)

10. Kenichi Katsuma (1 out of 1 patent)

11. Masatake Hirooka (1 out of 1 patent)

12. Keisuke Sagisaka (1 out of 1 patent)

13. Yoshifumi Noguchi (1 out of 3 patents)

14. Akira Yamamura (1 out of 13 patents)

15. Iwao Watanabe (1 out of 1 patent)

24 patents: Sort by Forward Citations

1. 9627111 - Magnetic member and electronic component (2017-04-18),

2. 9448262 - Current sensor having at least one cancel coil (2016-09-20),

3. 9426875 - Method for producing plasma flow, method for plasma processing, apparatus for producing plasma, and apparatus for plasma processing (2016-08-23),

4. 8999122 - Insulator interposed type plasma processing apparatus (2015-04-07),

5. 8833299 - Divided annular rib type plasma processing apparatus (2014-09-16),

6. 8562800 - Plasma generating apparatus and plasma processing apparatus (2013-10-22),

7. 8007176 - Dynamic pressure bearing and rotation machine employing same (2011-08-30),

8. 7976612 - Droplet removing device and method in plasma generator (2011-07-12),

9. 7823537 - Plasma generator (2010-11-02),

10. 7729504 - Ferrofluid centered voice coil speaker (2010-06-01),

11. 7266214 - Audio speaker and method for assembling an audio speaker (2007-09-04),

12. 7248714 - Micro-speaker and method for assembling a micro-speaker (2007-07-24),

13. 7063802 - Composition and method of making an element-modified ferrofluid (2006-06-20),

14. 6868167 - Audio speaker and method for assembling an audio speaker (2005-03-15),

15. 6804368 - Micro-speaker and method for assembling a micro-speaker (2004-10-12),

Ferrotec Corporation is a leading provider of advanced materials and technologies, specializing in the development and manufacturing of high-performance products for various industries. The company focuses on areas such as semiconductor manufacturing, medical devices, and energy solutions, leveraging its expertise in materials science and engineering. With a strong presence in Tokyo, Ferrotec serves a global market, delivering innovative solutions that enhance productivity and efficiency across multiple sectors.

Profile summary based on public USPTO records.

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USPTO Data Jan 1 1976 - Sep 29 2026

Ferrotec Corporation

24 Patents

#1,213 in Tokyo

#2,631 in Japan

#26,595 in the World

Ferrotec Corporation

Forward Citations = 133

27 inventors:

Shiro Tsuda (11 out of 13 patents)

Yuichi Shiina (5 out of 5 patents)

Yasutake Hirota (2 out of 2 patents)

4. Takayuki Hachida (2 out of 2 patents)

5. Lucian Borduz (2 out of 4 patents)

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