Assignee
TERRA AG
CH·5 granted patents·41 citations·filing 1987–2015
Top patents by PatentIndex Score
5 records- 0152US9840894B2Drill head and device with a sliding contact electrical connection for drilling a bore in the groundTERRA AG·Filed 2015·Granted Dec 12, 2017·1 cites·14 claims
- 0248US5094303AImpact apparatus and process for the control of impact apparatusTERRA AG·Filed 1991·Granted Mar 10, 1992·15 cites·3 claims
- 0339US4821813APercussion drilling apparatusTERRA AG·Filed 1987·Granted Apr 18, 1989·7 cites·12 claims
- 0438US5307883AMethod and apparatus for controlling a ramming deviceTERRA AG·Filed 1992·Granted May 3, 1994·11 cites·1 claims
- 0533US5193627AApparatus for controlling a ramming deviceTERRA AG·Filed 1991·Granted Mar 16, 1993·7 cites·17 claims
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