Inventor
Roger D. Stephenson
Inventor
Ottumwa, IA, US
Overview
Patents· 30 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
A01Dprimary
A01DHarvesting45%
A01BSoil working in agriculture or forestry18%
B60DVehicle connections10%
B60KArrangement or mounting of propulsion units or of transmissions in vehicles5%
A01FProcessing of harvested produce3%
B60GVehicle suspension arrangements3%
B62DMotor vehicles3%
F16BDevices for fastening or securing constructional elements or machine parts together, e.g. nails, bolts, circlips, clamps, clips or wedges3%
F16LPipes3%
G01RMeasuring electric variables3%
PatentTitleYear
10,653,061Method and apparatus for harvesting crop material202010,618,361Pin-drop hitch mount assembly with biased pin retainer mechanism202010,618,362Pin-drop hitch mount assembly with alignment features for aligning drawbar and drawbar receiver202010,589,580Pin-drop hitch mount assembly with biased pin retainer mechanism202010,556,472Pin-drop hitch mount assembly with biased pin retainer mechanism202010,448,570System of laying swath of cut crop for improved dry down time and method thereof201910,412,885Rotary cutterbar module end cap201910,412,886Debris diverter for rotary cutterbar201910,412,883Joint for rotary cutterbar201910,412,884Cutterbar module structure201910,398,079Disk guard support201910,356,980Work vehicle with wheel/track crop swath avoidance20199,485,913'Converging drum and stripper arrangement'20169,456,548'Conveyer for a material processing machine'20168,800,254'Harvesting platform having angled crop converging auger'20148,186,697'Suspension arrangement for rear castered wheels on a work machine'20127,207,166'Side-pull mower-conditioner tongue pivotably mounted to platform frame at location inboard of platform gearbox'20077,047,714'Tongue swing cylinder arrangement for rotary side-pull mower-conditioner'20066,845,603'Side-pull mower-conditioner tongue operatively associated with access door for closing door when tongue is swung'20056,386,790'One-piece stainless steel rim for mating a meter cover and base and method of making same'20026,181,230'Voltage coil and method and making same'20015,722,222'Center-pivot mower-conditioner drive'19985,642,607'Control device for selectively limiting stroke of swing actuator for implement mid-mounted pivot tongue'19975,566,536'Mower-conditioner platform suspension including single upper arm and hydraulic cylinder for platform lift'19965,427,192'Sliding pedestal shaft for PTO driven implements'19954,805,927'Hitch adapter for use in connecting semi-integral, PTO-driven implements to tractor three-point hitch'19894,793,430'Hitch and drive structure for PTO-driven, semi-integral implement'19884,776,606'Hitch and drive structure for pto-driven, semi-integral implement'19884,738,461'Implement hitch adaptor and transmission assembly for allowing towing tractor to turn sharply'19884,590,751'Double windrowing attachment for harvester'1986Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1986–2020Patents assigned to DEERE & CO (28)· patent assignee history
1986–1989Based in Bloomfield, IA, US· patent location history
1995–2020Based in Ottumwa, IA, US· patent location history
2001Patents assigned to ABB POWER T & D CO (1)· patent assignee history
2001–2002Based in Raleigh, NC, US· patent location history
2002Patents assigned to ABB AUTOMATION INC (1)· patent assignee history
2012Patents assigned to PARSONS STEPHEN K (1)· patent assignee history
2012Patents assigned to SLOAN CHARLES S (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| DEERE & CO | 28 | 1986–2020 |
| ABB AUTOMATION INC | 1 | 2002 |
| ABB POWER T & D CO | 1 | 2001 |
| PARSONS STEPHEN K | 1 | 2012 |
| SLOAN CHARLES S | 1 | 2012 |
Locations
| Location | Patents | Span |
|---|---|---|
| Ottumwa, IA, US | 23 | 1995–2020 |
| Bloomfield, IA, US | 5 | 1986–1989 |
| Raleigh, NC, US | 2 | 2001–2002 |