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Yamanashi, Japan

Fujitsu Quantum Devices Limited

USPTO Granted Patents = 109

% Expired Patents = 47.7

Forward Citations = 898

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101 inventors (with patents filed for the assignee):

Osamu Baba (11 out of 12 patents)

Naoyuki Miyazawa (9 out of 11 patents)

Yutaka Mimino (9 out of 9 patents)

4. Yoshio Aoki (8 out of 8 patents)

5. Muneharu Gotoh (8 out of 8 patents)

6. Hajime Matsuda (7 out of 11 patents)

7. Yoshihiro Yoneda (6 out of 48 patents)

8. Naoya Ikechi (5 out of 6 patents)

9. Takahiro Tan (5 out of 6 patents)

10. Takayuki Watanabe (5 out of 26 patents)

11. Kozo Makiyama (4 out of 73 patents)

12. Taro Hasegawa (4 out of 13 patents)

13. Takuya Fujii (4 out of 26 patents)

14. Mitsuji Nunokawa (4 out of 9 patents)

15. Ikuo Hanawa (4 out of 4 patents)

Core Competencies:

Semiconductor Device

Optical Device

Photodetection

High-Frequency Circuit

Transmitter

Receiver

Laser Diode

Interdigital Capacitor

Field Effect Transistor

Microwave Oscillator

Communication Device

Amplifier Circuit

109 patents: Sort by Forward Citations

1. 8133775 - Semiconductor device with mushroom electrode and manufacture method thereof (2012-03-13),

2. 7919415 - Process of manufacturing a semiconductor device (2011-04-05),

3. 7888193 - Semiconductor device with mushroom electrode and manufacture method thereof (2011-02-15),

4. 7709310 - Semiconductor device with mushroom electrode and manufacture method thereof (2010-05-04),

5. 7626443 - Switching circuit, switching module and method of controlling the switching circuit (2009-12-01),

6. 7570919 - Transmitter, receiver, and radio communications system and method (2009-08-04),

7. 7368750 - Semiconductor light-receiving device (2008-05-06),

8. 7352086 - Switching circuit, switching module and method of controlling the switching circuit (2008-04-01),

9. 7335542 - Semiconductor device with mushroom electrode and manufacture method thereof (2008-02-26),

10. 7303933 - Process of manufacturing a semiconductor device (2007-12-04),

11. 7267893 - Optical multilayer film and optical semiconductor device including the same (2007-09-11),

12. 7253513 - High-frequency switch device and electronic device using the same (2007-08-07),

13. 7223645 - Semiconductor device with mushroom electrode and manufacture method thereof (2007-05-29),

14. 7157756 - Field effect transistor (2007-01-02),

15. 7144164 - Optical device and method of manufacturing the same (2006-12-05),

Fujitsu Quantum Devices Limited, based in Yamanashi, Japan, specializes in the development and manufacturing of advanced semiconductor devices. The company focuses on a range of core technologies including optical devices, photodetection systems, and high-frequency circuits. Its expertise extends to transmitters, receivers, laser diodes, and interdigital capacitors, positioning it as a key player in the semiconductor industry. Fujitsu Quantum Devices is committed to innovation in electronic components that support various applications across multiple sectors.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Sep 29 2026

Fujitsu Quantum Devices Limited

109 Patents

#3 in Yamanashi 400-0862

#1,065 in Japan

#7,213 in the World

Yamanashi, Japan

Fujitsu Quantum Devices Limited

Forward Citations = 898

101 inventors:

Osamu Baba (11 out of 12 patents)

Naoyuki Miyazawa (9 out of 11 patents)

Yutaka Mimino (9 out of 9 patents)

4. Yoshio Aoki (8 out of 8 patents)

5. Muneharu Gotoh (8 out of 8 patents)

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