1. It is in this country, where patents are numerous and easily obtained, that improved machines and processes are most rapidly introduced, as in textile manufactures, in watchmaking, and shoe-making; and not in Switzerland, where until recently no patents have been granted, or in England and Germany, where patents have been hard to get;Contemporaries thought the logic was self-evident,1878
2. Les dits et les scènes du fait divers
3. How Do Patent Laws Influence Innovation? Evidence from Nineteenth-Century World's Fairs;Petra See;American Economic Review,2005