William Spengler

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Triel sur Seine, FR

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Patents Grantslast 30 patents

Information Patent Grant
Piston oil ring having land flanked by concave sidewalls
- Patent number 6,655,697
- Issue date Dec 2, 2003
- Dana Corporation
- Stephane Héraud
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

Information Patent Application
Piston oil ring having land flanked by concave sidewalls
- Publication number 20020070507
- Publication date Jun 13, 2002
- Stephane Heraud
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...