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Kawasaki-shi, Japan

Fuji Electric Systems Co. Ltd.

USPTO Granted Patents = 116

EPO Patents = 6

Trademarks = 1

Forward Citations = 582

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175 inventors (with patents filed for the assignee):

Koh Yoshikawa (5 out of 42 patents)

Hideto Kobayashi (5 out of 7 patents)

Katsunori Ueno (4 out of 92 patents)

4. Manabu Takei (4 out of 47 patents)

5. Noritomo Hirayama (4 out of 10 patents)

6. Kouhei Yamada (4 out of 18 patents)

7. Satoshi Sugahara (4 out of 37 patents)

8. Hironobu Yao (4 out of 15 patents)

9. Toshihiro Yamamoto (4 out of 35 patents)

10. Yoshinobu Sato (4 out of 13 patents)

11. Yoshinori Ohmuro (4 out of 4 patents)

12. Takashi Kobayashi (3 out of 31 patents)

13. Koji Sonobe (3 out of 14 patents)

14. Haruo Nakazawa (3 out of 43 patents)

15. Hitoshi Sumida (3 out of 29 patents)

Core Competencies:

Wide Band Gap Semiconductor Device

Uninterruptible Power Supply

Integrated Circuit

DC-DC Converter

Display Driving Device

Micro Power Converter

Cooling Apparatus

Electric Vehicle Driving Circuit

Power Factor Correction

Junction Field Effect Transistor

EMI Filter

Composite Integrated Semiconductor Device

116 patents: Sort by Forward Citations

1. 9450084 - Wide band gap semiconductor device (2016-09-20),

2. 8493696 - Uninterruptible power supply and method for tripping thereof (2013-07-23),

3. 8471585 - Method for evaluating semiconductor device (2013-06-25),

4. 8407027 - Online diagnostic method and online diagnostic system for geothermal generation facility (2013-03-26),

5. 8405343 - Inverter unit, integrated circuit chip, and vehicle drive apparatus (2013-03-26),

6. 8330295 - Uninterruptible power supply and method for selective tripping thereof (2012-12-11),

7. 8242976 - Display driving device, which performs scan driving of a display panel (2012-08-14),

8. 8136299 - Sliding door opening/closing device for vehicle (2012-03-20),

9. 8098059 - Current negative-feedback circuit and DC-DC converter using the circuit (2012-01-17),

10. 8089255 - Power factor correction power supply unit, and control circuit and control method used in the same (2012-01-03),

11. 8089134 - Semiconductor device (2012-01-03),

12. 8084893 - Semiconductor device for controlling switching power supply (2011-12-27),

13. 8081465 - Cooling apparatus for semiconductor chips (2011-12-20),

14. 8076897 - AC motor driving circuit and electric vehicle driving circuit (2011-12-13),

15. 8059437 - Integrated circuit and DC-DC converter formed by using the integrated circuit (2011-11-15),

FUJI ELECTRIC SYSTEMS CO. LTD. is a leading global company that develops and manufactures innovative electrical and electronic products and systems. With a strong focus on sustainability and energy efficiency, the company provides solutions for various industries including power generation, transportation, manufacturing, and infrastructure. Fuji Electric Systems offers a wide range of products such as power distribution equipment, industrial control systems, power electronics, and renewable energy systems. They are committed to delivering high-quality, reliable, and environmentally-friendly products to meet the evolving needs of their customers.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 23 2025

116 Patents

#2 in Kawasaki-shi

#1,002 in Japan

#6,640 in the World

Kawasaki-shi, Japan

Fuji Electric Systems Co. Ltd.

Forward Citations = 582

175 inventors:

Koh Yoshikawa (5 out of 42 patents)

Hideto Kobayashi (5 out of 7 patents)

Katsunori Ueno (4 out of 92 patents)

4. Manabu Takei (4 out of 47 patents)

5. Noritomo Hirayama (4 out of 10 patents)

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