The 'driving force' for bicycles has stayed virtually the same (human muscles), but the transmissions and layouts have been improved steadily. Only the advent of hybrid electric-and-muscle driven e-bikes can be seen as an actual revolution in cycling technology.
There have got to be hundreds.
Traffic lights and air brakes, 1868
Four-stroke internal combustion engine, 1876
toilet paper, 1880
Rayon, 1884
Steam turbine, 1884
Gas-powered automobile and motorcycle, 1885
dish-washer, Coca-cola (is that an invention?), 1886
radar, contact lenses, 1887
AC motor/transformer, 1888
cordite, 1889
escalator, 1891
zipper, 1893
Vs the first pedal-equipped bicycle, developed by Pierre Michaux, Pierre Lallement and the Olivier brothers in the 1860s.
Pretty much anything. Of course some of these methods are still in use today, depending on where you look.
Bicycles can hardly be considered an old technology. While Da Vinci had already sketched some designs in the late 15th century [1], the first prototypes could not be built before the early 19th century.
The first recognizable version of the current chain-driven models was only produced in 1885. [2]
The chain-driven bicycle is not as simple as it looks.
[1] http://www.ltolman.org/davinci.htm [2] http://en.wikipedia.org/wiki/Bicycles