Stefan Elenkov Zahariev

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Sofia, BG

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus for transforming the cross-section of a thin-walled cylinder
- Patent number 4,008,596
- Issue date Feb 22, 1977
- DSO "Montagi"
- Radoslav Stanev Petrov
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...