
Brennan's Gyroscopic Mono-rail Car
1907
1907
1909-1910
1913
1913
1830 (original); 1967 (model)
1907
1839 (original); circa 1988 (replica)
1915-1916
1952-3
1910
circa 1910
1910
1914
1955; 1830
1914
1914
1906-1916
1914
1914
1914
1914-1916
1906
1906
1915
1910
1910
1915
1906-1915
1906
1915
1934
1907
2000-100 BCE
1913
1872 (original); 1909 (model)
1915
1915
c.1912
1910
1915
1908
1909
1912
1912
1916
1911
1910
circa 1913
1913
1990-96