Helmut Schiwek

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Duisburg, DE

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Patents Grantslast 30 patents

Information Patent Grant
Safety container for potentially explosive and/or environmentally h...
- Patent number 6,178,991
- Issue date Jan 30, 2001
- Helmut Schiwek
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Oil retention barrier with anti-splashing means
- Patent number 6,017,452
- Issue date Jan 25, 2000
- Helmut Schiwek
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Glass fiber manufacturing process and plant
- Patent number 5,690,715
- Issue date Nov 25, 1997
- Helmut Schiwek
- C03 - GLASS MINERAL OR SLAG WOOL
Information Patent Grant
Oil barrier
- Patent number 5,688,074
- Issue date Nov 18, 1997
- Helmut Schiwek
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Method of removing oil and oil like environmental contaminants from...
- Patent number 5,466,379
- Issue date Nov 14, 1995
- Helmut Schiwek
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING