Helwig Schafer

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Herisau, CH

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Patents Grantslast 30 patents

Information Patent Grant
Device for ion-exchange chromatography and method of cyclically reg...
- Patent number 6,153,101
- Issue date Nov 28, 2000
- Metrohm AG
- Helwig Schafer
- G01 - MEASURING TESTING
Information Patent Grant
Method and device for preparing samples
- Patent number 5,861,097
- Issue date Jan 19, 1999
- Metrohm AG
- Helwig Schafer
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL