Wilhelm H. Koch

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Otelfingen, CH

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Patents Grantslast 30 patents

Information Patent Grant
Guide apparatus for copy masters
- Patent number 5,353,096
- Issue date Oct 4, 1994
- Gretag Imaging, AG
- Beat Frick
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Manual device for the determination or measurement of photometric d...
- Patent number 4,968,140
- Issue date Nov 6, 1990
- GRETAG Aktiengesellschaft
- Markus Berner
- G01 - MEASURING TESTING
Information Patent Grant
Densitometer
- Patent number 4,645,350
- Issue date Feb 24, 1987
- GRETAG Aktiengesellschaft
- Markus Weidmann
- G01 - MEASURING TESTING