Hart-Parr was founded in 1901 by Charles Hart and Charles Parr, both engineering students at the University of Wisconsin. Hart and Parr are two of the early pioneers of gasoline tractor design. Hart-Parr was the first American manufacturer to put gasoline tractors into production in 1903, and can make a claim to being the first in the world (the English Ivel firm also began production that year). In 1929, Hart-Parr merged with Oliver Chilled Plow to form the Oliver company.
Model Power Years
Hart-Parr 12-24 tractor photo Hart-Parr 12-24 26hp 1924 - 1930
No photo available Hart-Parr 16-30 33hp 1924 - 1926
No photo available Hart-Parr 17-30 33hp 1901 - 1906
Hart-Parr 18-36 tractor photo Hart-Parr 18-36 40hp 1926 - 1930
No photo available Hart-Parr 20 22hp 1920 - 1924
No photo available Hart-Parr 20-40 44hp 1912 - 1914
Hart-Parr 22-45 tractor photo Hart-Parr 22-45 50hp 1903 - 1911
Hart-Parr 28-44 tractor photo Hart-Parr 28-44 48hp 1930 - 1937
Hart-Parr 28-50 tractor photo Hart-Parr 28-50 55hp 1927 - 1930
No photo available Hart-Parr 30 33hp 1919 - 1924
Hart-Parr 40 tractor photo Hart-Parr 40 44hp 1923 - 1927
No photo available Hart-Parr 40-80 110hp 1908 - 1909
No photo available Hart-Parr 60-100 111hp 1911 - 1912
No photo available Hart-Parr Crop Maker 17-27 30hp 1916 - 1917
No photo available Hart-Parr Little Devil 25-22 24hp 1914 - 1916
No photo available Hart-Parr New Hart-Parr 33hp 1918 - 1919
Hart-Parr Oil King 23-35 tractor photo Hart-Parr Oil King 23-35 38hp 1916 - 1919
Hart-Parr Old Reliable 30-60 tractor photo Hart-Parr Old Reliable 30-60 66hp 1907 - 1918
Hart-Parr Row Crop 18-27 tractor photo Hart-Parr Row Crop 18-27 30hp 1930 - 1935
No photo available Hart-Parr Steel King 44hp 1916 -