UK Patent # 415,683 - Campagnolo

UK Patent 415,683 - Campagnolo main image

Dating from 1933, this is the earliest patent that I have found for a Campagnolo gear system. It describes a transmission with multiple sprockets, a remotely operated quick release hub and a toothed dropout.

These are all themes that Tullio Campagnolo would continue to explore for the next 15 years.