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9566702 | Hydraulic rotator converter for a hydraulic impact hammer and method | Jun 13, 14 | Feb 14, 17 | JW TOOLING, LLC |
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9016404 | Ram boring device | Aug 20, 10 | Apr 28, 15 | TRACTO-TECHNIK GMBH & CO. KG |
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8960325 | Free-mass and interface configurations of hammering mechanisms | Oct 27, 11 | Feb 24, 15 | CALIFORNIA INSTITUTE OF TECHNOLOGY |
8904990 | Dwell cycle crank with rollers | Aug 02, 11 | Dec 09, 14 | Not available |
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