Hans-Heinrich Hartmann

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Chonburi, TH

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Patents Grantslast 30 patents

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Apparatus and method for influencing the frictional conditions betw...
- Patent number 6,089,069
- Issue date Jul 18, 2000
- SMS Schloemann-Siemag Aktiengesellschaft
- Jurgen Seidel
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...