
Brennan's Gyroscopic Mono-rail Car
1907
1907
c.1912
1915
1830 (original); 1967 (model)
1903 (original); 1982 (model)
1989-1999
1973-1983
1989
1867-1868
1910-1920
1975
1969
1975-1985
1997
circa 1955
2000
1997
1877
1910
1950
1960
1955-1965
1922
1960
1916-1996
1900
1960
1968
1932
1964
1955; 1830
1950
1965
1955-1965
1875
1850
1963