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Cotton Gin
Eli Whitney -
Grain Reaper
Cyrus McCormick -
Seed Planter
Henry Blair -
Cotton Planter
Henry Blair -
Steel Moldboard Plow --- John Deere
John Deere -
Corn Picker
Edumnd Qunicy -
Barbed Wire
Joseph Glidden -
Milking Machine
Anna Baldwin -
Perishable Food Preservation
Thomas Elkins -
Crop Rotations
George Washington Carver -
Tractor
Benjamin Holt -
Gene Gun
John Sanford -
Robotic Milking Machine
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GPS Technology
