Inventor · disambiguated record
James T. Libert
Also filed as: LIBERT JAMES T
12 granted patents·468 citations·filing 1980–1987
93Inventor score
Files withSQUARE D CO12
Top patents by PatentIndex Score
12 records- 0195US4647825AUp-to-speed enable for jam under load and phase lossSQUARE D CO·Filed 1985·Granted Mar 3, 1987·110 cites·11 claims
- 0294US4796142AOverload protection apparatus for emulating the response of a thermal overloadSQUARE D CO·Filed 1986·Granted Jan 3, 1989·97 cites·5 claims
- 0389US4912390AApparatus for controlling firing of thyristors relative to a current reaching zero by using a microcomputer and hardware responsive to voltage crossing zeroSQUARE D CO·Filed 1986·Granted Mar 27, 1990·59 cites·8 claims
- 0484US4876468AThyristor driver turn-off circuitSQUARE D CO·Filed 1986·Granted Oct 24, 1989·34 cites·15 claims
- 0583US4710692ASelf calibration of the thyristor firing angel of a motor controller using a current window to determine a final value of a reference current lag phase angleSQUARE D CO·Filed 1986·Granted Dec 1, 1987·44 cites·15 claims
- 0678US4887018ALine to line to line to neutral converterSQUARE D CO·Filed 1986·Granted Dec 12, 1989·39 cites·2 claims
- 0768US4634951AReduced voltage starter with voltage ramp controlSQUARE D CO·Filed 1985·Granted Jan 6, 1987·24 cites·9 claims
- 0866US4344102AAnti-telegraph control circuit for electromagnet coilSQUARE D CO·Filed 1980·Granted Aug 10, 1982·14 cites·2 claims
- 0962US4724503APhase unbalance detectorSQUARE D CO·Filed 1986·Granted Feb 9, 1988·20 cites·14 claims
- 1056US4802053AControl circuitry including phase failure relaySQUARE D CO·Filed 1987·Granted Jan 31, 1989·20 cites·14 claims
- 1136US4409640AAbort cycle timerSQUARE D CO·Filed 1981·Granted Oct 11, 1983·3 cites·14 claims
- 1232US4714977AElectronic delay timerSQUARE D CO·Filed 1987·Granted Dec 22, 1987·4 cites·12 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →