Helmut Kreissler

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Oberkirch, DE

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Patents Grantslast 30 patents

Information Patent Grant
Recording medium with an envelope, and an identification part therefor
- Patent number 4,769,731
- Issue date Sep 6, 1988
- BASF Aktiengesellschaft
- Klaus Schoettle
- G11 - INFORMATION STORAGE
Information Patent Grant
Method for the surface treatment of magnetic recording media
- Patent number 4,514,937
- Issue date May 7, 1985
- BASF Aktiengesellschaft
- Manfred Gehrung
- B24 - GRINDING POLISHING