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Nippon Leakless Industry Co., Ltd.

USPTO Granted Patents = 30

EPO Patents = 5

Forward Citations = 240

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66 inventors (with patents filed for the assignee):

Akira Tanaka (11 out of 43 patents)

Masamichi Hoshi (10 out of 10 patents)

Tsunehiko Abe (6 out of 6 patents)

4. Shinichi Hirayama (4 out of 4 patents)

5. Hiroyuki Nakano (4 out of 8 patents)

6. Yoshitaka Matsushita (4 out of 4 patents)

7. Yasunori Murakami (4 out of 9 patents)

8. Naomichi Mitsuyama (3 out of 4 patents)

9. Yoshiharu Takada (3 out of 24 patents)

10. Akinori Sueyoshi (2 out of 2 patents)

11. Yuji Takahashi (2 out of 4 patents)

12. Osamu Tosa (2 out of 2 patents)

13. Koichi Nakajima (2 out of 7 patents)

14. Shingo Watanabe (2 out of 3 patents)

15. Yoshiaki Hamada (2 out of 10 patents)

30 patents: Sort by Forward Citations

1. 11326695 - Metal gasket (2022-05-10),

2. 10151393 - Metal gasket material plate and method for manufacturing the same (2018-12-11),

3. 9284913 - Metal gasket (2016-03-15),

4. 9121489 - Metal gasket (2015-09-01),

5. 8939452 - Metal gaskets for cylinder heads, and methods for manufacturing same (2015-01-27),

6. 7989027 - Metal gasket material plate and method for manufacturing the same (2011-08-02),

7. 7703775 - Metal gasket for cylinder head (2010-04-27),

8. 7147919 - Expansion graphite sheet of high thermal resistance, and exhaust gasket of high thermal resistance (2006-12-12),

9. 7048278 - Compound sheet gasket (2006-05-23),

10. 6957814 - Metal gasket (2005-10-25),

11. 6889983 - Gasket for high-temperature joint and method of fabricating the same (2005-05-10),

12. 6703078 - Metal gasket raw material plate and manufacturing method therefor (2004-03-09),

13. 6619666 - Metal gasket assembly (2003-09-16),

14. 6554286 - Metal gasket assembly for cylinder head (2003-04-29),

15. 6378876 - Metal gasket assembly for cylinder head (2002-04-30),

NIPPON LEAKLESS INDUSTRY CO., LTD. is a leading manufacturer of high-quality industrial sealing products. With decades of experience and expertise, our company specializes in the design, development, and production of various types of mechanical seals and sealing systems. Our products are widely used in industries such as oil and gas, petrochemicals, power plants, and many others. We pride ourselves on delivering innovative solutions to meet our customer's sealing requirements while ensuring superior performance, reliability, and safety. Visit our website for more information about our products and services.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 30 2025

30 Patents

#42 in Saitama 343-0827

#2,251 in Japan

#21,209 in the World

Nippon Leakless Industry Co., Ltd.

Forward Citations = 240

66 inventors:

Akira Tanaka (11 out of 43 patents)

Masamichi Hoshi (10 out of 10 patents)

Tsunehiko Abe (6 out of 6 patents)

4. Shinichi Hirayama (4 out of 4 patents)

5. Hiroyuki Nakano (4 out of 8 patents)

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