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Fuji Electric Device Technology Co., Ltd.

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USPTO Granted Patents = 152

% Expired Patents = 49.3

Forward Citations = 1,042

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205 inventors (with patents filed for the assignee):

Yasushi Sakai (11 out of 27 patents)

Hiroyuki Uwazumi (8 out of 41 patents)

Katsumichi Ueyanagi (8 out of 34 patents)

4. Eiji Mochizuki (7 out of 49 patents)

5. Kazunori Saito (6 out of 12 patents)

6. Yasuhiko Onishi (6 out of 38 patents)

7. Tatsuji Nagaoka (6 out of 12 patents)

8. Tatsuhiko Fujihira (6 out of 95 patents)

9. Kimihiro Ashino (5 out of 22 patents)

10. Yukihiro Nishikawa (5 out of 30 patents)

11. Sadayuki Watanabe (5 out of 14 patents)

12. Katsunori Ueno (4 out of 95 patents)

13. Naoki Kumagai (4 out of 42 patents)

14. Shigeru Shinoda (4 out of 7 patents)

15. Kouhei Yamada (4 out of 18 patents)

Core Competencies:

Magnetic Recording Medium

Semiconductor Device

Power Supply

Manufacturing Method

Insulated Gate

Perpendicular Recording

Magnetic Transfer

Evaluation Method

Thermally Assisted Recording

Semiconductor Module

Electrophotographic Photoconductor

Switching Regulator

152 patents: Sort by Forward Citations

1. 8206778 - Method of manufacturing a magnetic recording medium (2012-06-26),

2. 8097901 - Semiconductor device having insulated gate semiconductor element, and insulated gate bipolar transistor (2012-01-17),

3. 8094395 - Magnetic transfer method and magnetic recording medium (2012-01-10),

4. 8039133 - Magnetic recording medium and method for manufacturing the same (2011-10-18),

5. 8031562 - Master disk for magnetic transfer, a method of drawing a magnetic transfer pattern, and a magnetic recording medium having a transferred magnetic transfer pattern (2011-10-04),

6. 8023213 - Patterned medium inspection method and inspection device (2011-09-20),

7. 8014177 - Switching power supply with pulse frequency modulation control (2011-09-06),

8. 7995299 - Magnetic recording medium evaluation apparatus and evaluation method (2011-08-09),

9. 7993764 - Perpendicular magnetic recording medium and the method of manufacturing the same (2011-08-09),

10. 7993762 - Magnetic thin film and method of manufacturing the same, and various application devices using the same (2011-08-09),

11. 7985630 - Method for manufacturing semiconductor module (2011-07-26),

12. 7977704 - Semiconductor device having insulated gate semiconductor element, and insulated gate bipolar transistor (2011-07-12),

13. 7972716 - Perpendicular magnetic recording medium (2011-07-05),

14. 7944042 - Semiconductor device and method of manufacturing same (2011-05-17),

15. 7937967 - Method of manufacturing a glass substrate, glass substrate manufactured by the method, and magnetic recording medium using the glass substrate (2011-05-10),

Company Overview

Fuji Electric Device Technology Co., Ltd., based in Tokyo, specializes in the development and manufacturing of advanced magnetic recording media and semiconductor devices. The company focuses on innovative technologies such as insulated gate structures, perpendicular recording methods, and magnetic transfer techniques. With a strong emphasis on research and development, Fuji Electric aims to enhance the performance and efficiency of power supply systems and evaluation methods, contributing significantly to the fields of electronics and data storage.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Nov 3 2026

152 Patents

#420 in Tokyo

#847 in Japan

#5,376 in the World

Fuji Electric Device Technology Co., Ltd.

Forward Citations = 1,042

205 inventors:

Yasushi Sakai (11 out of 27 patents)

Hiroyuki Uwazumi (8 out of 41 patents)

Katsumichi Ueyanagi (8 out of 34 patents)

4. Eiji Mochizuki (7 out of 49 patents)

5. Kazunori Saito (6 out of 12 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Fuji Electric Device Technology Co., Ltd.. Retrieved from https://idiyas.com/company/fuji-electric-device-technology-company

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]

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