Ohio Inventers timeline

Main

1825
1837
1837
1852
1859
1859
1860
1860
1869
1870
1873
1877
1880
1884
1887
1889
1891
1896
1897
1897
1898
1900
1909
1920 - 1947
1920
1924
1930
1940
1946
1947
1969
1975
1991
1995
1995