Inventor

GRAHAM WILLIAM DOUGLAS

US19 patents

⚠️ This page may combine multiple inventors who share the name “GRAHAM WILLIAM DOUGLAS”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

GRAHAM WILLIAM DOUGLAS

DEERE & CO

Implement with active wing down force and wing lift sequencing

Gauge structure for a cylinder operated depth control

Folding walkway for seeding machine

Lift control for implement frame

Flexible frame for a multi-section implement

Pivoting planting units vertically

Commodity metering system for work vehicle and calibration method for same

Mounting assembly for hydraulic coupling

Frame folding arrangement with vertically pivoting planting units

Cylinder mounted stroke control

Lift tube for an agricultural implement frame

Systems and methods for downspout retention

Commodity metering system for work vehicle with rollers in staggered arrangement

Agricultural machine control based on sensed blockage distance

Pre-charging technique for dispensing product from tractor tool prior to reaching plant site

Cart stability system

Commodity cart tank with upper and lower fill openings

Self-locking hitch assembly

GRAHAM WILLIAM DOUGLAS

Active implement down force system with automatic latching of tractor power beyond pressure