Frank Dittrich

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Rebstein, CH

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Patents Grantslast 30 patents

Information Patent Grant
Method of stabilizing the horizon of magnetic compasses
- Patent number 5,995,913
- Issue date Nov 30, 1999
- Leica Geosystems AG
- Frank Dittrich
- G01 - MEASURING TESTING
Information Patent Grant
Method and device for determining correction parameters
- Patent number 5,946,813
- Issue date Sep 7, 1999
- Leica Geosystems AG
- Peter Nachbaur
- G01 - MEASURING TESTING
Information Patent Grant
Method for stabilizing the directional display of magnetic compasses
- Patent number 5,701,259
- Issue date Dec 23, 1997
- Leica AG
- Frank Dittrich
- G01 - MEASURING TESTING