Alfred Froehlich

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Marly-le-Grand, CH

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Patents Grantslast 30 patents

Information Patent Grant
Photographic material containing sulphonic acid group containing di...
- Patent number 4,118,232
- Issue date Oct 3, 1978
- Ciba-Geigy AG
- Bernhard Piller
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Sulfonic-acid-group containing disazo dyestuffs
- Patent number 4,051,123
- Issue date Sep 27, 1977
- Ciba-Geigy AG
- Bernhard Piller
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY