Assignee
XUZHOU XUGONG FOUNDATION CONSTR MACHINERY CO
CN·5 granted patents·0 citations·filing 2013–2020
Top patents by PatentIndex Score
5 records- 0147US12091293B2Main hoist system of rotary drilling rig, and control method thereforXUZHOU XUGONG FOUNDATION CONSTR MACHINERY CO·Filed 2020·Granted Sep 17, 2024·0 cites·8 claims
- 0241US12498297B2Test device and method for testing and commissioning comprehensive performance of rotary drilling rigXUZHOU XUGONG FOUNDATION CONSTR MACHINERY CO·Filed 2020·Granted Dec 16, 2025·0 cites·10 claims
- 0339US11268328B2Double-walled drill pipe and drilling machineXUZHOU XUGONG FOUNDATION CONSTR MACHINERY CO·Filed 2019·Granted Mar 8, 2022·0 cites·19 claims
- 0437US11603751B2Push-pull force control method for horizontal directional drilling machine and horizontal directional drilling machineXUZHOU XUGONG FOUNDATION CONSTR MACHINERY CO·Filed 2019·Granted Mar 14, 2023·0 cites·15 claims
- 0531US10041298B2Detachable combined-type drive key for rotary drilling rig power headXUZHOU XUGONG FOUNDATION CONSTR MACHINERY CO·Filed 2013·Granted Aug 7, 2018·0 cites·4 claims
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