Karlfried Preyer

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Wermelskirchen, DE

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Patents Grantslast 30 patents

Information Patent Grant
Oil-scraper piston ring and a method for producing an oil-scraper p...
- Patent number 7,117,594
- Issue date Oct 10, 2006
- Federal-Mogul Burscheid GmbH
- Karlfried Preyer
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Method of making oil scraper piston rings
- Patent number 6,199,274
- Issue date Mar 13, 2001
- Federal-Mogul Burscheid GmbH
- Karlfried Preyer
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR

Patents Applicationslast 30 patents

Information Patent Application
Oil-scrapper piston ring and a method for producing an oil-scraper...
- Publication number 20020190476
- Publication date Dec 19, 2002
- Karlfried Preyer
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...