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Ckd Corporation

USPTO Granted Patents = 328

% Expired Patents = 7.9

EPO Patents = 36

Trademarks = 3

Forward Citations = 2,284

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325 inventors (with patents filed for the assignee):

Masayuki Kouketsu (33 out of 36 patents)

Hiroshi Itafuji (27 out of 30 patents)

Tsuyoshi Ohyama (25 out of 25 patents)

4. Norihiko Sakaida (24 out of 24 patents)

5. Hideyuki Takeda (19 out of 19 patents)

6. Takahiro Mamiya (18 out of 18 patents)

7. Akihiro Ito (18 out of 31 patents)

8. Hiroyuki Ishigaki (17 out of 17 patents)

9. Yukihiro Taguchi (16 out of 16 patents)

10. Yasunori Nishimura (14 out of 14 patents)

11. Shinji Itoh (12 out of 12 patents)

12. Mitsuhiro Kosugi (12 out of 12 patents)

13. Hiroyuki Murase (12 out of 12 patents)

14. Atsushi Fukuta (11 out of 11 patents)

15. Hiroki Iwata (10 out of 11 patents)

Core Competencies:

Fluid Control Valve

Three-Dimensional Measurement

Inspection Device

Blister Packaging Machine

Temperature Control System

Electromagnetic Valve

Solder Printing Inspection

Pilot-Type Electromagnetic Valve

Vortex Flowmeter

Gas Supply Unit

Vacuum Pressure Control

Micromixer

328 patents: Sort by Forward Citations

1. 12716520 - Automatic pressure control device, film forming apparatus and pressure control method (2026-08-25),

2. 12680965 - Attenuating an inspection device that inspects transparent or translucent cylindrical body (2026-07-14),

3. 12674520 - Valve unit (2026-07-07),

4. 12656271 - Board testing apparatus and board testing method (2026-06-16),

5. 12655834 - Diaphragm and chemical flow control device (2026-06-16),

6. 12648393 - Temperature regulating apparatus for semiconductor-device manufacturing equipment, and semiconductor-device manufacturing system (2026-06-02),

7. 12601587 - Three-dimensional measurement device (2026-04-14),

8. 12586173 - Apparatus for hair inspection on substrate and method for hair inspection on substrate (2026-03-24),

9. 12578034 - Vacuum pressure control system (2026-03-17),

10. 12578024 - Fluid control valve (2026-03-17),

11. 12510273 - Temperature control system (2025-12-30),

12. 12486909 - Fluid control valve and method for manufacturing the same (2025-12-02),

13. 12474001 - Fluid device coupler and fluid device coupling structure (2025-11-18),

14. 12449065 - Pressure control valve (2025-10-21),

15. 12446162 - Screen mask inspection device, solder printing inspection device, and method for inspecting screen mask (2025-10-14),

Ckd Corporation, headquartered in Aichi, Japan, specializes in the development and manufacturing of fluid control devices. The company focuses on innovative technologies such as fluid control valves, electromagnetic valves, and temperature control systems, catering to various industrial applications. Ckd also excels in three-dimensional measurement and inspection devices, enhancing quality assurance in manufacturing processes. Their expertise extends to blister packaging machines and solder printing inspection, positioning them as a key player in the fluid control and automation sectors.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Sep 29 2026

Ckd Corporation

328 Patents

#8 in Aichi

#507 in Japan

#2,747 in the World

Ckd Corporation

Forward Citations = 2,284

325 inventors:

Masayuki Kouketsu (33 out of 36 patents)

Hiroshi Itafuji (27 out of 30 patents)

Tsuyoshi Ohyama (25 out of 25 patents)

4. Norihiko Sakaida (24 out of 24 patents)

5. Hideyuki Takeda (19 out of 19 patents)

Please report any incorrect information to [email protected]

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