Helmut Schoenfelder

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Unterdarching/Valley, DE

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Patents Grantslast 30 patents

Information Patent Grant
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- Patent number 5,925,431
- Issue date Jul 20, 1999
- Zweckform Etikettiertechnik GmbH
- Helmut Schoenfelder
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS