Erich Doring

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9442 Berneck, CH

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Patents Grantslast 30 patents

Information Patent Grant
Sound reproducing apparatus for non-rotating plate-shaped or sheet-...
- Patent number 4,740,945
- Issue date Apr 26, 1988
- Erich Doring
- G11 - INFORMATION STORAGE
Information Patent Grant
Sound-illustrated, bound book
- Patent number 4,425,098
- Issue date Jan 10, 1984
- Erich Doring
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS