Vesa Ropponen

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Punkalaidun, FI

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Patents Grantslast 30 patents

Information Patent Grant
Automated collar-forming drill mechanism
- Patent number 6,427,508
- Issue date Aug 6, 2002
- T-Drill Oy
- Pertti Lehto
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...