Johannes Dratner

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Castrop-Rauxel, DE

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Patents Grantslast 30 patents

Information Patent Grant
Adapter device for composite electrodes with an auxiliary reactance...
- Patent number 5,940,426
- Issue date Aug 17, 1999
- Danieli & C. Officine Meccaniche S.p.A.
- Johannes Dratner
- F27 - FURNACES KILNS OVENS RETORTS
Information Patent Grant
Automatic system for connection of pneumatic and hydraulic hoses on...
- Patent number 5,905,754
- Issue date May 18, 1999
- Danieili & C. Officine Meccaniche SpA
- Johannes Dratner
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Secondary circuit with variable impedance for electric arc furnaces
- Patent number 5,715,273
- Issue date Feb 3, 1998
- Danieli & C. Officine Meccaniche S.p.A.
- Johannes Dratner
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR