Helmut Roloff

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Neinburg, DE

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Patents Grantslast 30 patents

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Method and device for preheating raw materials for glass production...
- Patent number 4,696,690
- Issue date Sep 29, 1987
- Himly, Holscher GmbH & Co.
- Helmut Roloff
- C03 - GLASS MINERAL OR SLAG WOOL