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Kitz Corporation

USPTO Granted Patents = 92

% Expired Patents = 21.7

CIPO Patents = 2

EPO Patents = 13

Trademarks = 31

Forward Citations = 561

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88 inventors (with patents filed for the assignee):

Kazuhiro Aoki (8 out of 8 patents)

Chikashi Gomi (7 out of 7 patents)

Osamu Watanabe (6 out of 129 patents)

4. Masazumi Funato (6 out of 6 patents)

5. Tetsuya Watanabe (6 out of 89 patents)

6. Kazuhito Kurose (6 out of 6 patents)

7. Tomoyuki Ozasa (6 out of 6 patents)

8. Hisanori Terui (5 out of 5 patents)

9. Mitsuru Hosokawa (5 out of 6 patents)

10. Takako Sakurai (4 out of 4 patents)

11. Masahiro Kazama (4 out of 4 patents)

12. Teruhiko Horigome (4 out of 4 patents)

13. Masaru Yamazaki (4 out of 7 patents)

14. Norikazu Sugaya (4 out of 4 patents)

15. Yoshiharu Sato (4 out of 4 patents)

Core Competencies:

Butterfly Valve

Ball Valve

Fluid Purification

Valve Manufacturing

Trunnion Ball Valve

Pneumatic Actuator

Copper-Based Alloy

Valve Inspection

Pressure-Resistance Inspection

Hydrogen Station

Leadless Brass Alloy

Micro-Filtration

92 patents: Sort by Forward Citations

1. 12748008 - Valve seat inspection method and valve seat inspection device using image recognition camera (2026-09-29),

2. 12663084 - Sealing member, sealing mechanism, valve, and sealing method (2026-06-23),

3. 12565941 - Valve (2026-03-03),

4. 12379035 - Valve, and method for manufacturing said valve (2025-08-05),

5. 12276949 - Valve state grasping system, display device and rotary valve, valve state grasping program, recording medium, and valve state grasping method (2025-04-14),

6. 12139430 - Wash water processing apparatus and sterilization and water-purification apparatus, and wash water processing method (2024-11-12),

7. 12135098 - Valve (2024-11-05),

8. 12092224 - Lined butterfly valve and method for manufacturing lined butterfly valve (2024-09-17),

9. 12072064 - Hydrogen gas filling method and hydrogen station (2024-08-27),

10. 11982360 - Double eccentric butterfly valve and manufacturing method therefor (2024-05-14),

11. 11975995 - Wash water processing apparatus and sterilization and purification unit, and wash water processing method of semiconductor element or liquid-crystal glasses (2024-05-07),

12. 11892097 - Valve state grasping system using motion sensor fixed to valve stem (2024-02-06),

13. 11761556 - Valve wear state grasping method and system using valve stem angular velocity (2023-09-19),

14. 11732807 - Eccentric butterfly valve (2023-08-22),

15. 11703129 - Valve disk of double eccentric butterfly valve, and double eccentric butterfly valve (2023-07-18),

Company Overview

Kitz Corporation, headquartered in Chiba, Japan, specializes in valve technology, focusing on the development and manufacturing of various valve types, including butterfly valves, ball valves, and trunnion ball valves. The company is recognized for its expertise in fluid purification systems and valve inspection processes, utilizing advanced materials such as copper-based alloys. Kitz Corporation serves a diverse range of industries, providing reliable solutions that enhance fluid control and management in various applications.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

92 Patents

#16 in Chiba

#1,185 in Japan

#8,367 in the World

Kitz Corporation

Forward Citations = 561

88 inventors:

Kazuhiro Aoki (8 out of 8 patents)

Chikashi Gomi (7 out of 7 patents)

Osamu Watanabe (6 out of 129 patents)

4. Masazumi Funato (6 out of 6 patents)

5. Tetsuya Watanabe (6 out of 89 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Kitz Corporation. Retrieved from https://idiyas.com/company/kitz

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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