Harald Helletsberger

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Patents Grantslast 30 patents

Information Patent Grant
Method of coating fibrous reinforcement material
- Patent number 4,338,357
- Issue date Jul 6, 1982
- Tyrolit Schleifmittelwerke Swarovski K.G.
- Herwig Pichler
- C03 - GLASS MINERAL OR SLAG WOOL
Information Patent Grant
Method for improving the quality of abrasive grains
- Patent number 4,278,449
- Issue date Jul 14, 1981
- Tyrolit Schleifmittelwerke Swarovski K.G.
- Harald Helletsberger
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...