Anna I. Levina

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Kiev, SU

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Patents Grantslast 30 patents

Information Patent Grant
Spark trainer for welders
- Patent number 4,689,021
- Issue date Aug 25, 1987
- Institute Problem Modelirovaniya v Energetike an UKR.SSR
- Vsevolod V. Vasiliev
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS