Inventor · disambiguated record
Leo Spiegel
Also filed as: SPIEGEL LEO · SPIEGEL LEO J
23 granted patents·3 pending applications·765 citations·filing 1979–2019
96Inventor score
Top patents by PatentIndex Score
26 records- 0195US5617058ADigital signal processing for linearization of small input signals to a tri-state power switchAPOGEE TECHNOLOGY INC·Filed 1995·Granted Apr 1, 1997·300 cites·18 claims
- 0291US4537067AInertial borehole survey systemWILSON IND INC·Filed 1983·Granted Aug 27, 1985·128 cites·38 claims
- 0384US4454756AInertial borehole survey systemWILSON IND INC·Filed 1982·Granted Jun 19, 1984·81 cites·51 claims
- 0480US10384524B2Drive train of a motor vehicle that can be driven in a purely electric mannerPORSCHE AG·Filed 2013·Granted Aug 20, 2019·7 cites·14 claims
- 0577US4550228ARibbon speaker systemAPOGEE ACOUSTICS INC·Filed 1983·Granted Oct 29, 1985·57 cites·25 claims
- 0674US5195143AAcoustical ribbon transducer loudspeaker systemAPOGEE ACOUSTICS INC·Filed 1991·Granted Mar 16, 1993·40 cites·6 claims
- 0773US5588504AProcess and arrangement for supplying lubricant to a reciprocating piston engineFEV MOTORENTECHNIK GMBH & CO·Filed 1994·Granted Dec 31, 1996·31 cites·23 claims
- 0872US8479509B2Internal combustion engineSPIEGEL LEO·Filed 2010·Granted Jul 9, 2013·3 cites·9 claims
- 0972US4364045ADigitized displacement transducerNORTHROP CORP·Filed 1981·Granted Dec 14, 1982·21 cites·11 claims
- 1068US8235013B2Internal combustion engineSPIEGEL LEO·Filed 2010·Granted Aug 7, 2012·3 cites·15 claims
- 1168US6647711B1Device for supplying exhaust gases from an internal combustion engine to a catalytic converterVOLKSWAGEN AG·Filed 2000·Granted Nov 18, 2003·16 cites·18 claims
- 1265US6866031B2Direct injection internal combustion engineVOLKSWAGEN AG·Filed 2002·Granted Mar 15, 2005·14 cites·12 claims
- 1363US10821836B2High-voltage battery division for charging column connectionPORSCHE AG·Filed 2018·Granted Nov 3, 2020·1 cites·9 claims
- 1459US6666177B1Method for operating an internal combustion engine comprising at least one working pistonVOLKSWAGEN AG·Filed 2000·Granted Dec 23, 2003·11 cites·6 claims
- 1554US8851217B2Method for starting the internal combustion engine of a hybrid vehicleSCHIEK WERNER·Filed 2011·Granted Oct 7, 2014·2 cites·5 claims
- 1652US10038354B2Arrangement of an electric machine and of a transmission connected downstream thereofPORSCHE AG·Filed 2015·Granted Jul 31, 2018·0 cites·19 claims
- 1748US11267328B2Drive train and method for operating a drive trainPORSCHE AG·Filed 2019·Granted Mar 8, 2022·0 cites·5 claims
- 1848US6378486B1Four-stroke internal combustion engine with direct injectionVOLKSWAGEN AG·Filed 1999·Granted Apr 30, 2002·23 cites·14 claims
- 1943US4274040ASolenoid torquer systemNORTHROP CORP·Filed 1979·Granted Jun 16, 1981·5 cites·11 claims
- 2041US2016236561A1Drive train and method for operating a drive trainPORSCHE AG·Filed 2016·Application pending·0 cites
- 2140US11190084B2Electric machine for a motor vehicle and method for cooling an electric machinePORSCHE AG·Filed 2015·Granted Nov 30, 2021·0 cites·9 claims
- 2237US5400970ADevice for the combined blowoff of fuel and airFEV MOTORENTECH GMBH & CO KG·Filed 1993·Granted Mar 28, 1995·13 cites·3 claims
- 2336US8492945B2Starter-generatorGRUENBERGER JOACHIM·Filed 2010·Granted Jul 23, 2013·0 cites·8 claims
- 2436US2012085199A1Drive system for a motor vehicle, method for operating a drive system of this kind and motor vehicle having a drive system of this kindSAUVLET NILS·Filed 2011·Application pending·0 cites
- 2532US5289711AApparatus for spreading steel structuresSPIEGEL LEO J·Filed 1992·Granted Mar 1, 1994·9 cites·9 claims
- 2627US2004103876A1Internal combustion engine comprising direct injection and a method for operating the sameFiled 2002·Application pending·0 cites
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