Inventor · disambiguated record
Philip J. Ehrhart
Also filed as: EHRHART PHILIP J · KOCH EARL E
35 granted patents·573 citations·filing 1976–2019
98Inventor score
Files withCNH AMERICA LLC17SPERRY CORP6NEW HOLLAND NORTH AMERICA INC5FORD NEW HOLLAND INC3CNH IND AMERICA LLC2
Top patents by PatentIndex Score
35 records- 0195US7603837B2Header height control system and apparatusCNH AMERICA LLC·Filed 2006·Granted Oct 20, 2009·40 cites·9 claims
- 0287US4216641ACrop harvesting machineSPERRY CORP·Filed 1979·Granted Aug 12, 1980·50 cites·16 claims
- 0386US7973654B2Cutterbar failure detection system and methodCNH AMERICA LLC·Filed 2008·Granted Jul 5, 2011·16 cites·23 claims
- 0486US4531349ARotary cutter for disc mower-conditionerSPERRY CORP·Filed 1984·Granted Jul 30, 1985·41 cites·20 claims
- 0585US8001751B2Method for gradually relieving pressure in a hydraulic system utilizing reverse fluid flow through a pump of the systemCNH AMERICA LLC·Filed 2007·Granted Aug 23, 2011·19 cites·20 claims
- 0685US6073431ASelf-propelled windrowerNEW HOLLAND NORTH AMERICA INC·Filed 1998·Granted Jun 13, 2000·49 cites·19 claims
- 0784US9101090B2Windrower autoguidance hydraulic steering interfaceCNH AMERICA LLC·Filed 2013·Granted Aug 11, 2015·15 cites·6 claims
- 0880US7730703B1Modular disc cutterbarCNH AMERICA LLC·Filed 2009·Granted Jun 8, 2010·15 cites·14 claims
- 0980US7669392B2Header height control system with flow divider capabilityCNH AMERICA LLC·Filed 2007·Granted Mar 2, 2010·16 cites·15 claims
- 1079US7730701B1Variable speed hydraulic conditioner driveCNH AMERICA LLC·Filed 2009·Granted Jun 8, 2010·17 cites·19 claims
- 1179US4081946AHeader suspension and lift meansSPERRY RAND CORP·Filed 1976·Granted Apr 4, 1978·28 cites·12 claims
- 1278US6675563B1Disc cutterbar shear protectionNEW HOLLAND NORTH AMERICA INC·Filed 2002·Granted Jan 13, 2004·24 cites·16 claims
- 1375US7832189B1Apparatus to improve modular cutterbar connecting shaft spline durabilityCNH AMERICA LLC·Filed 2009·Granted Nov 16, 2010·10 cites·11 claims
- 1474US6513311B1Automatic configuration of dual cutter mode windrowersNEW HOLLAND NORTH AMERICA INC·Filed 2002·Granted Feb 4, 2003·20 cites·14 claims
- 1573US8997902B2Windrower steering systemCNH AMERICA LLC·Filed 2013·Granted Apr 7, 2015·7 cites·9 claims
- 1672US10464602B2Limited slip differential drive system and methods of using the sameCNH IND AMERICA LLC·Filed 2017·Granted Nov 5, 2019·2 cites·20 claims
- 1771US7987656B2Header height control system and apparatusCNH AMERICA LLC·Filed 2009·Granted Aug 2, 2011·8 cites·11 claims
- 1870US4793129AInversion chute for windrow turnerFORD NEW HOLLAND INC·Filed 1987·Granted Dec 27, 1988·28 cites·13 claims
- 1968US7277785B2Apparatus and method to calibrate a draper on an agricultural header on an agricultural windrowerCNH AMERICA LLC·Filed 2006·Granted Oct 2, 2007·8 cites·16 claims
- 2068US4567716AFull quadrant crop lifter for disc mower-conditionersSPERRY CORP·Filed 1984·Granted Feb 4, 1986·22 cites·10 claims
- 2165US4418517AActuating mechanism for harvester transport lockSPERRY CORP·Filed 1982·Granted Dec 6, 1983·19 cites·11 claims
- 2264US7980049B1Twin sheet vacuum formed covers for disc mower cutterbarsCNH AMERICA LLC·Filed 2010·Granted Jul 19, 2011·5 cites·16 claims
- 2363US4793125AFrame for windrow inverterFORD NEW HOLLAND INC·Filed 1987·Granted Dec 27, 1988·20 cites·7 claims
- 2463US4418518AMechanism for spring loading a transport lockSPERRY CORP·Filed 1982·Granted Dec 6, 1983·19 cites·9 claims
- 2562US7954309B2Apparatus to improve modular cutterbar connecting shaft spline durabilityCNH AMERICA LLC·Filed 2010·Granted Jun 7, 2011·3 cites·12 claims
- 2660US5867970AHeader lift system for harvestersNEW HOLLAND NORTH AMERICA INC·Filed 1997·Granted Feb 9, 1999·19 cites·8 claims
- 2758US8356695B2Method and apparatus for oiling splines in a bevel gearboxCNH AMERICA LLC·Filed 2009·Granted Jan 22, 2013·7 cites·14 claims
- 2856US7082361B2Electronic speed control system for farm machinesCNH AMERICA LLC·Filed 2004·Granted Jul 25, 2006·12 cites·5 claims
- 2953USD645479SMower discCNH AMERICA LLC·Filed 2011·Granted Sep 20, 2011·8 cites·1 claims
- 3048US4385484APivotable shields for disc mower-conditionerSPERRY CORP·Filed 1981·Granted May 31, 1983·11 cites·16 claims
- 3147US11731688B2Differential steering control vehicle, system and methodCNH IND AMERICA LLC·Filed 2019·Granted Aug 22, 2023·0 cites·20 claims
- 3247US6239696B1Signal light system for agricultural equipmentNEW HOLLAND NORTH AMERICA INC·Filed 1999·Granted May 29, 2001·11 cites·13 claims
- 3347USD306737SWindrow inverterFORD NEW HOLLAND INC·Filed 1987·Granted Mar 20, 1990·4 cites·1 claims
- 3438US9096268B2Control group mounting relative to controlled hardwareCNH AMERICA LLC·Filed 2013·Granted Aug 4, 2015·0 cites·10 claims
- 3537US9795080B2Disc mower cutterbar shroudEHRHART PHILIP J·Filed 2012·Granted Oct 24, 2017·0 cites·17 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →