In this paper, we give an overview of the differences in German patent legislations between 1815 and 1876. German patent laws differed in particular with regard to the application and approval system, the treatment of foreign applicants, and patent fees. Differences in the former two categories...

This paper analyzes the consequences of radical patent-regime change by exploiting a natural experiment: the forced adoption of the Prussian patent system in territories annexed after the Austro-Prussian War of 1866. Compared to other German states, Prussia granted patents more restrictively by...