Naoki Ito

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Okaya, JP

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Patents Grantslast 30 patents

Information Patent Grant
Hard film, sliding member covered with hard film, and manufacturing...
- Patent number 6,372,369
- Issue date Apr 16, 2002
- Teikoku Piston Ring Co., Ltd.
- Naoki Ito
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Sliding member
- Patent number 6,149,162
- Issue date Nov 21, 2000
- Teikoku Pistong Ring Co., Ltd.
- Shoji Tanaka
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Hard coating material, sliding member covered with hard coating mat...
- Patent number 6,060,182
- Issue date May 9, 2000
- Teikoku Piston Ring Co., Ltd.
- Shoji Tanaka
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...