Assignee
DREXELBROOK ENG CO
8 granted patents·257 citations·filing 1979–1998
Top patents by PatentIndex Score
8 records- 0195US4485673ATwo-wire level measuring instrumentDREXELBROOK ENG CO·Filed 1981·Granted Dec 4, 1984·79 cites·6 claims
- 0288US5049878ATwo-wire compensated level measuring instrumentDREXELBROOK ENG CO·Filed 1989·Granted Sep 17, 1991·52 cites·13 claims
- 0375US5760309AUltrasonic method for material monitoringDREXELBROOK ENG CO·Filed 1996·Granted Jun 2, 1998·36 cites·80 claims
- 0472US5987994AUltrasonic method for material monitoringDREXELBROOK ENG CO·Filed 1998·Granted Nov 23, 1999·35 cites·42 claims
- 0558US4363030AFail-safe instrument systemDREXELBROOK ENG CO·Filed 1979·Granted Dec 7, 1982·13 cites·30 claims
- 0657US4851831ATwo-wire level measuring instrumentDREXELBROOK ENG CO·Filed 1984·Granted Jul 25, 1989·15 cites·9 claims
- 0751US5307678AMaterial level probe having crimp sealDREXELBROOK ENG CO·Filed 1993·Granted May 3, 1994·14 cites·30 claims
- 0845US4573040AFail-safe instrument systemDREXELBROOK ENG CO·Filed 1985·Granted Feb 25, 1986·13 cites·12 claims
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