Hans Pratzer

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Darmstadt, DE

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Patents Grantslast 30 patents

Information Patent Grant
Powdery pearlescent pigment compositions
- Patent number 4,205,997
- Issue date Jun 3, 1980
- Merck Patent Gesellschaft mit beschrankter Haftung
- Reiner Hesse
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Powdery pearlescent pigment composition
- Patent number 4,116,628
- Issue date Sep 26, 1978
- E. Merck
- Reiner Hesse
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE