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For the Inventor, By the Inventor

Osaka, Japan

Fujikin Inc.


USPTO Granted Patents = 444



Trademarks = 18

Forward Citations = 3,392

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314 inventors (with patents filed for the assignee):

goldMedal Nobukazu Ikeda (182 out of 211 patents)

silverMedal Kouji Nishino (139 out of 155 patents)

bronzeMedal Michio Yamaji (122 out of 142 patents)

4.  Tsutomu Shinohara (114 out of 121 patents)

5.  Ryousuke Dohi (84 out of 95 patents)

6.  Masaaki Nagase (69 out of 72 patents)

7.  Kaoru Hirata (62 out of 65 patents)

8.  Tomohiro Nakata (57 out of 59 patents)

9.  Katsuyuki Sugita (45 out of 48 patents)

10.  Tadayuki Yakushijin (34 out of 36 patents)

11.  Takahiro Matsuda (31 out of 31 patents)

12.  Yukio Minami (29 out of 38 patents)

13.  Takashi Hirose (29 out of 43 patents)

14.  Tadahiro Ohmi (27 out of 201 patents)

15.  Akihiro Morimoto (27 out of 51 patents)


Core Competencies:
Diaphragm Valve
Flow Rate Control Device
Fluid Control Device
Pressure Control Device
Concentration Measurement Device
Vaporization Supply Device
Abnormality Detection Method
Fluid Supply System
Electromagnetic Valve
Hybrid Valve
Operation Information Collection System
Density Measurement Device

444 patents:

1. 12523559 - Electrostatic capacitive pressure sensor for fluid pressure detection (2026-01-13),
2. 12523558 - Pressure sensor that mitigates zero drop phenomena (2026-01-13),
3. 12510179 - Valve control apparatus, valve control system, valve control method, and valve control program (2025-12-30),
4. 12494383 - Gas supply device and semiconductor manufacturing apparatus (2025-12-09),
5. 12492985 - Density measurement device (2025-12-09),
6. 12436548 - Flow rate control device, flow rate control device control method, and flow rate control device control program (2025-10-07),
7. 12435798 - Diaphragm valve and flow rate control device (2025-10-07),
8. 12424468 - Concentration measurement device (2025-09-23),
9. 12414712 - Information processing system (2025-09-16),
10. 12405182 - Cover component for pressure sensor, and pressure sensor device comprising same (2025-09-02),
11. 12398819 - Controller and vaporization supply device (2025-08-26),
12. 12334355 - Pressure control device (2025-06-17),
13. 12326718 - Operation information collection system for fluid control device, fluid control device, operation information collection method for fluid control device, and computer executable program (2025-06-10),
14. 12313205 - Closing plug and fluid control device (2025-05-27),
15. 12306647 - Flow rate control device and flow rate control method wherein an internal command signal is generated by a combination of first order lag process and ramp process (2025-05-20),
Fujikin Inc. is a global leader in the design and manufacturing of high-quality and high-performance fluid control equipment. With over 60 years of experience, Fujikin specializes in providing advanced and reliable solutions for industries such as semiconductor, solar energy, medical, and automotive. Their products range from ultra-high purity valves and fittings to control systems and gas delivery systems. Fujikin's commitment to research and development, quality, and customer satisfaction has made them a trusted choice for precision fluid control solutions worldwide.
This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Jan 20 2026

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444 Patents

#43 in Osaka

#400 in Japan

#2,082 in the World

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Osaka, Japan

Fujikin Inc.

Forward Citations = 3,392

314 inventors:

goldMedal Nobukazu Ikeda (182 out of 211 patents)

silverMedal Kouji Nishino (139 out of 155 patents)

bronzeMedal Michio Yamaji (122 out of 142 patents)

4.  Tsutomu Shinohara (114 out of 121 patents)

5.  Ryousuke Dohi (84 out of 95 patents)

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