One of the least studied aspects of Australian economic history is technological change. This article addresses the subject by using patent statistics from nineteenth–century Victoria to examine the determinants of the supply of inventive ideas in the late colonial era. Such an examination indicates that, while both demand– and supply–side features clearly had roles to play in influencing the volume of ideas that emerged, it was the expansion and diversification of Australian markets in the latter half of the century that was most important. These findings also suggest that development and introduction of new technological ideas in pre–Federation Australia were predominantly economic activities shaped by local considerations.