Assignee
BEHRENS ROBERT N
US·6 granted patents·270 citations·filing 1984–1988
Top patents by PatentIndex Score
6 records- 0194US4852672ADrill apparatus having a primary drill and a pilot drillBEHRENS ROBERT N·Filed 1988·Granted Aug 1, 1989·137 cites·6 claims
- 0278US4715747AAir motivated conduit prover apparatusBEHRENS ROBERT N·Filed 1986·Granted Dec 29, 1987·43 cites·11 claims
- 0373US4589499AHorizontal drilling apparatusBEHRENS ROBERT N·Filed 1984·Granted May 20, 1986·39 cites·15 claims
- 0462US5125460APneumatically actuated horizontal drilling apparatus having a plurality of drillsBEHRENS ROBERT N·Filed 1987·Granted Jun 30, 1992·31 cites·58 claims
- 0554US4583390AApparatus for squeezing off and rerounding pipeBEHRENS ROBERT N·Filed 1985·Granted Apr 22, 1986·11 cites·14 claims
- 0645US4838299APulsation dampener apparatusBEHRENS ROBERT N·Filed 1988·Granted Jun 13, 1989·9 cites·11 claims
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