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For the Inventor, By the Inventor

Chiba, Japan

Kitz Corporation


USPTO Granted Patents = 89



Trademarks = 36

Forward Citations = 543

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86 inventors (with patents filed for the assignee):

goldMedal Kazuhiro Aoki (8 out of 8 patents)

silverMedal Chikashi Gomi (7 out of 7 patents)

bronzeMedal Osamu Watanabe (6 out of 127 patents)

4.  Kazuhito Kurose (6 out of 6 patents)

5.  Tomoyuki Ozasa (6 out of 6 patents)

6.  Hisanori Terui (5 out of 5 patents)

7.  Takako Sakurai (4 out of 4 patents)

8.  Masazumi Funato (4 out of 4 patents)

9.  Masahiro Kazama (4 out of 4 patents)

10.  Teruhiko Horigome (4 out of 4 patents)

11.  Masaru Yamazaki (4 out of 7 patents)

12.  Tetsuya Watanabe (4 out of 5 patents)

13.  Norikazu Sugaya (4 out of 4 patents)

14.  Yoshiharu Sato (4 out of 4 patents)

15.  Masaharu Watanabe (4 out of 12 patents)


Core Competencies:
Valve Manufacturing
Butterfly Valve
Trunnion Ball Valve
Hydrogen Station
Fluid Purification
Copper Alloy
Pressure-Resistance Inspection
Wash Water Processing
Cryogenic Globe Valve
Pneumatic Actuator
Leadless Brass Alloy
Shaft Sealing Structure

89 patents:

1. 12379035 - Valve, and method for manufacturing said valve (2025-08-05),
2. 12276949 - Valve state grasping system, display device and rotary valve, valve state grasping program, recording medium, and valve state grasping method (2025-04-14),
3. 12139430 - Wash water processing apparatus and sterilization and water-purification apparatus, and wash water processing method (2024-11-12),
4. 12135098 - Valve (2024-11-05),
5. 12092224 - Lined butterfly valve and method for manufacturing lined butterfly valve (2024-09-17),
6. 12072064 - Hydrogen gas filling method and hydrogen station (2024-08-27),
7. 11982360 - Double eccentric butterfly valve and manufacturing method therefor (2024-05-14),
8. 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),
9. 11892097 - Valve state grasping system using motion sensor fixed to valve stem (2024-02-06),
10. 11761556 - Valve wear state grasping method and system using valve stem angular velocity (2023-09-19),
11. 11732807 - Eccentric butterfly valve (2023-08-22),
12. 11703129 - Valve disk of double eccentric butterfly valve, and double eccentric butterfly valve (2023-07-18),
13. 11698137 - Centric butterfly valve (2023-07-11),
14. 11655898 - Cryogenic globe valve (2023-05-23),
15. 11486499 - Gate valve (2022-11-01),
KITZ CORPORATION is a leading manufacturer of industrial valves and fittings. With over 70 years of expertise, KITZ offers a wide range of high-quality products for various industries including oil and gas, chemical, power, and water treatment. Their innovative solutions and commitment to customer satisfaction have made them a reliable partner worldwide.
This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Dec 30 2025

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89 Patents

#12 in Chiba

#1,183 in Japan

#8,376 in the World

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Chiba, Japan

Kitz Corporation

Forward Citations = 543

86 inventors:

goldMedal Kazuhiro Aoki (8 out of 8 patents)

silverMedal Chikashi Gomi (7 out of 7 patents)

bronzeMedal Osamu Watanabe (6 out of 127 patents)

4.  Kazuhito Kurose (6 out of 6 patents)

5.  Tomoyuki Ozasa (6 out of 6 patents)

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