Inventor · disambiguated record
Donald K. Landphair
Also filed as: LANDPHAIR DONALD · LANDPHAIR DONALD K · LANDPHAIR DONALD KEITH · PETERSON JAMES R
39 granted patents·2 pending applications·1,454 citations·filing 1984–2021
98Inventor score
Files withDEERE & CO33LANDPHAIR DONALD K3BROCKMANN THOMAS C1GREEN LAWRENCE D1LANDPHAIR DONALD KEITH1
Top patents by PatentIndex Score
41 records- 0197US9675004B2Soil moisture-based planter downforce controlDEERE & CO·Filed 2015·Granted Jun 13, 2017·49 cites·17 claims
- 0296US9801332B2System and method for consistent depth seeding to moistureDEERE & CO·Filed 2015·Granted Oct 31, 2017·33 cites·19 claims
- 0396US8504310B2Particulate flow sensing for an agricultural implementLANDPHAIR DONALD K·Filed 2009·Granted Aug 6, 2013·83 cites·19 claims
- 0495US10143128B2Soil moisture-based planter downforce controlDEERE & CO·Filed 2017·Granted Dec 4, 2018·24 cites·16 claims
- 0595US9883626B2Controlling an agricultural vehicle based on sensed inputsDEERE & CO·Filed 2015·Granted Feb 6, 2018·39 cites·20 claims
- 0695US8577561B2Control system and method of operating a product distribution machineGREEN LAWRENCE D·Filed 2011·Granted Nov 5, 2013·84 cites·5 claims
- 0795US8365679B2Seed spacing monitoring system for use in an agricultural seederDEERE & CO·Filed 2010·Granted Feb 5, 2013·55 cites·10 claims
- 0894US7765943B2Dual function seed meterDEERE & CO·Filed 2007·Granted Aug 3, 2010·67 cites·25 claims
- 0994US7213525B2Nozzle assembly for product-on-demand delivery systemDEERE & CO·Filed 2004·Granted May 8, 2007·65 cites·20 claims
- 1093US8522700B2Air seeder with GPS based on/off control of individual row unitsLANDPHAIR DONALD K·Filed 2008·Granted Sep 3, 2013·27 cites·10 claims
- 1192US11202404B2Planter row unit downforce control with ground view sensorDEERE & CO·Filed 2019·Granted Dec 21, 2021·15 cites·19 claims
- 1291US5029624AClosed granular chemical handling systemDEERE & CO·Filed 1990·Granted Jul 9, 1991·72 cites·24 claims
- 1390US7472660B2Seed tube for an agricultural seeding machineDEERE & CO·Filed 2005·Granted Jan 6, 2009·36 cites·25 claims
- 1490US5379812AClosed granular chemical handling systemDEERE & CO·Filed 1993·Granted Jan 10, 1995·58 cites·11 claims
- 1590US5161473ASeed distribution system and method for a seeding implementDEERE & CO·Filed 1991·Granted Nov 10, 1992·167 cites·35 claims
- 1688US9043949B2System and method of calibrating the meter of a product distribution machineLIU JAMES Z·Filed 2012·Granted Jun 2, 2015·31 cites·13 claims
- 1788US8948980B2Seeding machine for planting multiple seed varietiesDEERE & CO·Filed 2012·Granted Feb 3, 2015·39 cites·10 claims
- 1888US8695396B2Method of calibrating the meter of a product distribution apparatus and monitoring methodLANDPHAIR DONALD K·Filed 2010·Granted Apr 15, 2014·34 cites·10 claims
- 1986US8863676B2Twin-row multiple variety planter and method of useBROCKMANN THOMAS C·Filed 2012·Granted Oct 21, 2014·35 cites·6 claims
- 2086US7418908B2Seed hopper and routing structure for varying material delivery to row unitsDEERE & CO·Filed 2005·Granted Sep 2, 2008·29 cites·9 claims
- 2185US7647875B2Seed hopper and routing structure for varying material delivery to row unitsDEERE & CO·Filed 2008·Granted Jan 19, 2010·24 cites·8 claims
- 2285US5125438AClosed granular chemical handling systemDEERE & CO·Filed 1991·Granted Jun 30, 1992·42 cites·3 claims
- 2384US7273016B2Variable speed drive for agricultural seeding machinesDEERE & CO·Filed 2004·Granted Sep 25, 2007·42 cites·17 claims
- 2484US6595148B2Individual seed hoppers forming banks of seed hoppersDEERE & CO·Filed 2001·Granted Jul 22, 2003·43 cites·6 claims
- 2582US5060701AClosed granular chemical handling systemDEERE & CO·Filed 1990·Granted Oct 29, 1991·46 cites·5 claims
- 2681US6725788B2Pneumatic coupler for an agricultural seeding machineDEERE & CO·Filed 2002·Granted Apr 27, 2004·41 cites·20 claims
- 2780US5845818ARemovable meter cartridge for metering systemDEERE & CO·Filed 1997·Granted Dec 8, 1998·49 cites·14 claims
- 2879US9744817B2Apparatus and method for automatic tire pressure adjustmentDEERE & CO·Filed 2015·Granted Aug 29, 2017·1 cites·11 claims
- 2973US5449042ARephasing controlling/controlled hydraulic cylinders in folding implement frameDEERE & CO·Filed 1994·Granted Sep 12, 1995·28 cites·7 claims
- 3070US4607708AFoldable frame flexing hingeDEERE & CO·Filed 1984·Granted Aug 26, 1986·19 cites·7 claims
- 3168US12127497B2Planter row unit downforce control with ground view sensorDEERE & CO·Filed 2021·Granted Oct 29, 2024·0 cites·23 claims
- 3264US5224527AClosed granular chemical handling systemDEERE & CO·Filed 1992·Granted Jul 6, 1993·25 cites·4 claims
- 3364US4539246ASocket casting with a cast-in ball and method of castingDEERE & CO·Filed 1984·Granted Sep 3, 1985·11 cites·18 claims
- 3463US4721167AHitch flexing hingeDEERE & CO·Filed 1986·Granted Jan 26, 1988·18 cites·16 claims
- 3561USRE43772ESeed tube for an agricultural seeding machineMARIMAN NATHAN A·Filed 2011·Granted Oct 30, 2012·4 cites·40 claims
- 3649US5484025ALocking row marker hydraulic cylinders in retracted transport conditionDEERE & CO·Filed 1994·Granted Jan 16, 1996·12 cites·7 claims
- 3746US11665990B2Work vehicle with ground support unit having non-treaded area aligned with row unit componentDEERE & CO·Filed 2018·Granted Jun 6, 2023·0 cites·20 claims
- 3845US4690260ARadial engagement drive couplerDEERE & CO·Filed 1986·Granted Sep 1, 1987·7 cites·11 claims
- 3944US2013125800A1Seed spacing monitoring system for use in an agricultural seederDEERE & CO·Filed 2013·Application pending·0 cites
- 4038US11490560B2Fertilizer meter with motor control and method thereofDEERE & CO·Filed 2019·Granted Nov 8, 2022·0 cites·12 claims
- 4138US2010101469A1Seed hopper and routing structure for varying material delivery to row unitsLANDPHAIR DONALD KEITH·Filed 2010·Application pending·0 cites
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →