Shuji Samejima

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Saitama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Nitrided piston ring with outer layer on surface
- Patent number 4,570,946
- Issue date Feb 18, 1986
- Nippon Piston Ring Co., Ltd.
- Takeshi Tsuchiya
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Nitrided piston ring with outer layer on surface
- Patent number 4,557,492
- Issue date Dec 10, 1985
- Nippon Piston Ring Co., Ltd.
- Takeshi Tsuchiya
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...