Many important railroad technologies were developed by the US, even very early on: the US invented the cowcatcher and leading trucks on locomotives, and built the first locomotive to be duplicated. The Janney (automatic) coupler and the Westinghouse air brakes are major railroad innovations developed by the US, albeit in the 1870s. Geared steam locomotives (i.e., the Shay locomotive) were also developed by the US for mountainous logging operations.