Assignee
DUFFERS SCIENT INC
US·9 granted patents·275 citations·filing 1983–1992
Top patents by PatentIndex Score
9 records- 0190US4734555AMethod and apparatus for measuring and controlling indentation in resistance weldingDUFFERS SCIENT INC·Filed 1987·Granted Mar 29, 1988·61 cites·40 claims
- 0285US5092179ADynamic material testing system having independent control over specimen deformation and strain rate and a method for use thereinDUFFERS SCIENT INC·Filed 1991·Granted Mar 3, 1992·72 cites·26 claims
- 0375US5202542ATest specimen/jaw assembly that exhibits both self-resistive and self-inductive heating in response to an alternating electrical current flowing therethroughDUFFERS SCIENT INC·Filed 1991·Granted Apr 13, 1993·35 cites·35 claims
- 0469US5195378ADynamic thermal-mechanical material testing system utilizing a balanced magnetic fieldDUFFERS SCIENT INC·Filed 1991·Granted Mar 23, 1993·35 cites·18 claims
- 0567US5199304AApparatus for optically measuring specimen deformation during material testingDUFFERS SCIENT INC·Filed 1992·Granted Apr 6, 1993·32 cites·18 claims
- 0654US4721906AOne step RMS systemDUFFERS SCIENT INC·Filed 1985·Granted Jan 26, 1988·18 cites·20 claims
- 0748US4509000ABumpless feedback switching apparatus for use in a servo systemDUFFERS SCIENT INC·Filed 1983·Granted Apr 2, 1985·12 cites·8 claims
- 0844US4631697ASignal controlled waveform recorderDUFFERS SCIENT INC·Filed 1984·Granted Dec 23, 1986·8 cites·14 claims
- 0929USRE34843ESignal controlled waveform recorderDUFFERS SCIENT INC·Filed 1988·Granted Jan 31, 1995·2 cites·1 claims
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