Heinrich Helker

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Krefeld, DE

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Patents Grantslast 30 patents

Information Patent Grant
Device for supplying gas to rotary kilns
- Patent number 5,779,468
- Issue date Jul 14, 1998
- Bayer Aktiengesellschaft
- Heinrich Helker
- F27 - FURNACES KILNS OVENS RETORTS
Information Patent Grant
Device for supplying gas to a cylindrical rotary kiln
- Patent number 5,431,560
- Issue date Jul 11, 1995
- Bayer Aktiengesellschaft
- Heinrich Helker
- F27 - FURNACES KILNS OVENS RETORTS