
Brennan's Gyroscopic Mono-rail Car
1907
1907
1878-1879
1879
1903
1915-1918
1918-1920
1919
circa 1897
1920-1925
1917
1870
1895-1904
1880-1920
1890-1910
1880-1920
circa 1871
1898
1918
1903
1901-1910
1875
1880
1900-1920
1879
1775-1799 (original); 1900-1907 (model)
1871
1879-1896
1870
1905
1925-1926
1901
1910
1910
1896
1879
1880-1920
1890-1920
1880-1920
1880-1920
1880-1920
after 1903
1924
1909
circa 1905
1918
1915
1914-1918
1913
1898-1908
2000-100 BCE