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Jan Kruger
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Essen, DE
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last 30 patents
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Patent Grant
Method and apparatus for forming a necked and flanged part on a hol...
Patent number
5,653,138
Issue date
Aug 5, 1997
Krupp Maschinentechnik Gesellschaft mit beschrankter Haftung
Jan Kruger
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...