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Stefan Wrede
KIRCHHUNDEM, DE
1. 20090101412 DRILL-STRING SHOCK ABSORBERS - Implementations of the present invention relate generally to methods systems and apparatus for absorbing vibration and 04-23-20092. 20090056931 CLAMPING AND BREAKING DEVICE - system for clamping and breaking threaded tubular members includes a clamping device configured to grip a threaded 03-05-2009