Assignee
HELLER VERWALTUNGSGES
4 granted patents·85 citations·filing 1975–1979
Top patents by PatentIndex Score
4 records- 0170US4036308AApparatus for removing the drillings from the drilling site of a drillHELLER VERWALTUNGSGES·Filed 1975·Granted Jul 19, 1977·51 cites·13 claims
- 0267US4275796ARock drilling toolHELLER VERWALTUNGSGES·Filed 1979·Granted Jun 30, 1981·16 cites·8 claims
- 0339US4243113ADrilling head of a rotary impact drillHELLER VERWALTUNGSGES·Filed 1979·Granted Jan 6, 1981·8 cites·10 claims
- 0429US4305264ADevice for damping vibrations of a drilling tubeHELLER VERWALTUNGSGES·Filed 1979·Granted Dec 15, 1981·10 cites·13 claims
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