Friedrich Dannhaeuser

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Munich, DE

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Patents Grantslast 30 patents

Information Patent Grant
Method for code protection using an electronic key
- Patent number 4,928,098
- Issue date May 22, 1990
- Siemens Aktiengesellschaft
- Friedrich Dannhaeuser
- G07 - CHECKING-DEVICES
Information Patent Grant
Method and apparatus for transmission of optical data between two e...
- Patent number 4,887,312
- Issue date Dec 12, 1989
- Siemens Aktiengesellschaft
- Friedrich Dannhaeuser
- G07 - CHECKING-DEVICES