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Nittan Valve Co., Ltd.

USPTO Granted Patents = 89

CIPO Patents = 4

EPO Patents = 56

Trademarks = 4

Forward Citations = 235

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98 inventors (with patents filed for the assignee):

Michihiro Kameda (17 out of 19 patents)

Kazunori Kurahashi (9 out of 9 patents)

Koichi Homma (8 out of 9 patents)

4. Masaaki Niiro (7 out of 7 patents)

5. Yukio Kubota (6 out of 60 patents)

6. Shigeru Uchida (5 out of 7 patents)

7. Ryo Onose (5 out of 5 patents)

8. Maiku Mikami (5 out of 5 patents)

9. Masayasu Nagado (5 out of 6 patents)

10. Katsunori Otobe (4 out of 10 patents)

11. Shinichi Nishimura (4 out of 35 patents)

12. Akihiko Hosaka (4 out of 29 patents)

13. Yosuke Makino (4 out of 4 patents)

14. Yuji Okamura (4 out of 4 patents)

15. Masaaki Inoue (3 out of 8 patents)

Core Competencies:

Engine Poppet Valve

Friction Welding

Mechanical Lash Adjuster

Hollow Poppet Valve

Hydraulic Lash Adjuster

Variable Cam Phaser

High-Temperature Corrosion Resistance

Ni-Cr-Co-Based Alloy

Automated Heat Treatment

Cutting Apparatus

Torque Transmission Device

Workpiece Inspection Equipment

89 patents: Sort by Forward Citations

1. 11536167 - Method for manufacturing engine poppet valve (2022-12-27),

2. 11300018 - Hollow exhaust poppet valve (2022-04-12),

3. 11298776 - Friction welding method and friction welding apparatus (2022-04-12),

4. 11285570 - Method of manufacturing engine valve intermediate product with boss portion (2022-03-29),

5. 11143063 - Cylinder head and engine (2021-10-12),

6. 10934897 - Mechanical lash adjuster (2021-03-02),

7. 10804780 - Hollow single-phase induction motor (2020-10-13),

8. 10799957 - Chuck device (2020-10-13),

9. 10710153 - Method for filling with metallic sodium (2020-07-14),

10. 10569318 - Cutting apparatus and cutting blade (2020-02-25),

11. RE47823 - Direct-acting valve lifter of internal combustion engine (2020-01-20),

12. 10473622 - Method and apparatus for flaw inspection of friction-weld part of stem in engine valve (2019-11-12),

13. 10473002 - Poppet valve and method for manufacturing same (2019-11-12),

14. 10451162 - Torque transmission device (2019-10-22),

15. 10352203 - Hydraulic lash adjuster and method for using hydraulic lash adjuster (2019-07-16),

NITTAN VALVE CO., LTD. is a leading global manufacturer of valves and related products. With over 50 years of experience, the company specializes in providing high-quality valves for various industries including oil and gas, petrochemical, power, and water treatment. NITTAN VALVE's products are known for their reliability, durability, and superior performance. The company is committed to innovation and continuous improvement, ensuring customer satisfaction and meeting international standards. Visit their website for more information.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 30 2025

89 Patents

#1 in Hadano

#1,182 in Japan

#8,375 in the World

Nittan Valve Co., Ltd.

Forward Citations = 235

98 inventors:

Michihiro Kameda (17 out of 19 patents)

Kazunori Kurahashi (9 out of 9 patents)

Koichi Homma (8 out of 9 patents)

4. Masaaki Niiro (7 out of 7 patents)

5. Yukio Kubota (6 out of 60 patents)

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