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Ishikawa Gasket Co., Ltd.

USPTO Granted Patents = 231

EPO Patents = 7

Forward Citations = 1,947

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47 inventors (with patents filed for the assignee):

Tsunekazu Udagawa (99 out of 99 patents)

Yoshio Miyaoh (44 out of 44 patents)

Susumu Inamura (31 out of 31 patents)

4. Yoshio Yamada (16 out of 19 patents)

5. Kisho Yasuda (13 out of 13 patents)

6. Toshihiro Imai (13 out of 51 patents)

7. Itsuo Ishikawa (7 out of 7 patents)

8. Yuichi Kinoshita (6 out of 6 patents)

9. Kishou Yasuda (6 out of 6 patents)

10. Tatsuro Uchida (5 out of 87 patents)

11. Tadashi Kasuya (5 out of 8 patents)

12. Yuuichi Kinoshita (5 out of 7 patents)

13. Hidetaka Nakasone (4 out of 4 patents)

14. Hisashi Yasui (4 out of 4 patents)

15. Kenji Yamada (3 out of 88 patents)

Core Competencies:

Gasket Technology

Seal Connection Body

Cylinder Head Gasket

Metal Gasket

Rubber Ring

Metal Laminate Gasket

Surface Finishing Method

Manufacturing Method

Gasket Design

Engine Components

Mis-Assembly Detection

231 patents: Sort by Forward Citations

1. 12480580 - Seal connection body and gasket (2025-11-25),

2. 12181049 - Gasket (2024-12-31),

3. 11493131 - Seal ring groups (2022-11-08),

4. 11035469 - Manifold gasket (2021-06-15),

5. 10962115 - Cylinder head gasket (2021-03-30),

6. 10844958 - Gasket and manufacturing method thereof (2020-11-24),

7. 10844957 - Gasket (2020-11-24),

8. 10738889 - Gasket (2020-08-11),

9. 10711897 - Gasket (2020-07-14),

10. 10591062 - Gasket and manufacturing method thereof (2020-03-17),

11. 10465797 - Gasket (2019-11-05),

12. 10443730 - Gasket (2019-10-15),

13. 10139002 - Gasket equipped with bead with different hardness (2018-11-27),

14. 10125871 - Gasket (2018-11-13),

15. 10113505 - Gasket and engine with the gasket (2018-10-30),

Ishikawa Gasket Co., Ltd. is a leading manufacturer of gaskets and sealing solutions. With over 50 years of experience, the company has established a strong reputation for delivering high-quality products to various industries worldwide. Ishikawa Gasket Co., Ltd. specializes in manufacturing gaskets for automotive, industrial, and marine applications. Their commitment to continuous improvement, technological innovation, and customer satisfaction sets them apart in the market.

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

Company Badge

USPTO Data Jan 1 1976 - Jan 6 2026

231 Patents

#271 in Tokyo

#614 in Japan

#3,604 in the World

Ishikawa Gasket Co., Ltd.

Forward Citations = 1,947

47 inventors:

Tsunekazu Udagawa (99 out of 99 patents)

Yoshio Miyaoh (44 out of 44 patents)

Susumu Inamura (31 out of 31 patents)

4. Yoshio Yamada (16 out of 19 patents)

5. Kisho Yasuda (13 out of 13 patents)

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