Inventor · disambiguated record
Daniel P. Grenn
Also filed as: GRENN DANIEL P
24 granted patents·2 pending applications·248 citations·filing 1987–2019
95Inventor score
Files withGM GLOBAL TECH OPERATIONS LLC8GM GLOBAL TECH OPERATIONS INC6GEN MOTORS CORP5RICHARDS JEFFREY S2BISBING JOSEPH1
Top patents by PatentIndex Score
26 records- 0196US5345817AMisfire detection in internal combustion enginesGEN MOTORS CORP·Filed 1993·Granted Sep 13, 1994·128 cites·8 claims
- 0285US10981557B2Battery pack balancing systems and control logic for multi-pack electric-drive motor vehiclesGM GLOBAL TECH OPERATIONS LLC·Filed 2019·Granted Apr 20, 2021·5 cites·20 claims
- 0383US9047722B2Vehicle location and fault diagnostic systems and methodsGM GLOBAL TECH OPERATIONS INC·Filed 2013·Granted Jun 2, 2015·19 cites·8 claims
- 0476US9612289B2Detection diagnostic for communication loss between a battery system manager controller and a plurality of battery cell sensing boardsGM GLOBAL TECH OPERATIONS LLC·Filed 2014·Granted Apr 4, 2017·2 cites·18 claims
- 0576US8055400B2Control system and method for filtering dependent diagnostic trouble codesGM GLOBAL TECH OPERATIONS INC·Filed 2008·Granted Nov 8, 2011·10 cites·12 claims
- 0675US10124679B2Method and apparatus for recharging an energy storage device on a vehicleGM GLOBAL TECH OPERATIONS LLC·Filed 2015·Granted Nov 13, 2018·3 cites·8 claims
- 0773US6531872B1Ignition-off timer diagnosticGEN MOTORS CORP·Filed 2000·Granted Mar 11, 2003·18 cites·15 claims
- 0872US7359774B2Telematic service system and methodGEN MOTORS CORPROATION·Filed 2005·Granted Apr 15, 2008·10 cites·30 claims
- 0969US9533549B2System and method for controlling heating modes for hybrid electric vehicle (HEV)GM GLOBAL TECH OPERATIONS LLC·Filed 2014·Granted Jan 3, 2017·2 cites·17 claims
- 1069US9217765B2Method and system for isolating voltage sensor and contactor faults in an electrical systemLAZAR II WALTER M·Filed 2012·Granted Dec 22, 2015·6 cites·13 claims
- 1162US9428073B2System and method of monitoring a performance level of a batteryGM GLOBAL TECH OPERATIONS LLC·Filed 2014·Granted Aug 30, 2016·2 cites·20 claims
- 1261US8600605B2Distributed diagnostics architectureGRENN DANIEL P·Filed 2006·Granted Dec 3, 2013·7 cites·40 claims
- 1360US7069911B1Apparatus and methods for protecting a catalytic converter from misfireGEN MOTORS CORP·Filed 2005·Granted Jul 4, 2006·4 cites·22 claims
- 1459US2015224979A1Drive mode moderator for a vehicleGM GLOBAL TECH OPERATIONS INC·Filed 2014·Application pending·0 cites
- 1557US8688318B2DC converter diagnostics for vehiclesRICHARDS JEFFREY S·Filed 2012·Granted Apr 1, 2014·1 cites·20 claims
- 1656US10106042B2Methods of operating contactors in high voltage circuits of vehiclesGM GLOBAL TECH OPERATIONS LLC·Filed 2015·Granted Oct 23, 2018·1 cites·19 claims
- 1756US8041478B2Securing and diagnosing the vehicle speed input and direction for torque control systemsGM GLOBAL TECH OPERATIONS INC·Filed 2009·Granted Oct 18, 2011·2 cites·18 claims
- 1856US6386021B1Oxygen sensor heater service bay testGEN MOTORS CORP·Filed 2000·Granted May 14, 2002·11 cites·16 claims
- 1952US8670894B2Control system and method for sensor signal out of range detectionWANG WENBO·Filed 2009·Granted Mar 11, 2014·2 cites·16 claims
- 2052US4768480AEngine with spark ignition operation through the oil pressure switch after fuel shutoffGEN MOTORS CORP·Filed 1987·Granted Sep 6, 1988·14 cites·4 claims
- 2152US2009187304A1Electronic control module integrated diagnostic flight recorder methods and systemsGM GLOBAL TECH OPERATIONS INC·Filed 2008·Application pending·0 cites
- 2250US8838330B2Diagnostics for smart sensors of vehiclesRICHARDS JEFFREY S·Filed 2012·Granted Sep 16, 2014·1 cites·17 claims
- 2348US9830751B2System and method for clearing a readiness bit when a control module of a vehicle is reprogrammedGM GLOBAL TECH OPERATIONS LLC·Filed 2016·Granted Nov 28, 2017·0 cites·23 claims
- 2441US10090125B2Methods of determining the order of operating contactors in high voltage circuitsGM GLOBAL TECH OPERATIONS LLC·Filed 2016·Granted Oct 2, 2018·0 cites·18 claims
- 2540US9283947B2System and method for determining battery capacity in an electric vehicleBISBING JOSEPH·Filed 2011·Granted Mar 15, 2016·0 cites·2 claims
- 2640US7826963B1Diagnostic system for spark ignition direct injection system control circuitsGM GLOBAL TECH OPERATIONS INC·Filed 2009·Granted Nov 2, 2010·0 cites·20 claims
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