
Brennan's Gyroscopic Mono-rail Car
1907
1907
1905
1830 (original); 1967 (model)
1910
1910
1909
circa 1905
1915
1913
2000-100 BCE
1914
1934
1915
circa 1910
1914
1914
1910
1955; 1830
1906-1915
1907
1872 (original); 1909 (model)
1910
1908
c.1912
1912
1905
1915
1914
1914
1915
1910
1911
1914
1906
1915
1906
1912
1915
1906
1801-1892 (prepared); 1946 (element replaced)
1908
1910
1907
4000-2001 BCE
1934
1839 (original); circa 1988 (replica)
1906
1772 (original); 1919 (model)
circa 1913
1990-96