1948-49: Unloading Augurs

1950-51: Sorghum Attachments with Straight-Through Augers

1952-54: Retractable Finger Augers

1954-56: Straw Choppers 

1955: Heston Model 100, first commercially available self-propelled windrower

1963: 500 windrower

1970: StackHand 60, first loose hay stacker

1971: 520 windrower

1976: 5400 and 5800 Series round balers

1978: Hesston 4800 large square baler, first in the world to produce 4x4 foot square bales.