Gerhard A. Worndli

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6045 Meggen, CH

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Patents Grantslast 30 patents

Information Patent Grant
Recording medium
- Patent number 4,932,681
- Issue date Jun 12, 1990
- Gerhard A. Worndli
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Process for irreversible recording, recording carrier, as well as u...
- Patent number 4,871,193
- Issue date Oct 3, 1989
- Gerhard A. Worndli
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS