Inventors (4) Inventions (3) Technological innovations (3) Inventos (3) Innovation (3) Inventeurs (3) Innovations (3) Inventions (3) invention (3) États-Unis (2) History (2) Exhibitions (2) Wealth (2) Success (2) Running (2) Renaissance (2) Oral examinations (2) Octroi (2) Nineteenth century (2) Intellectual property (2) Dilemma (2) Copyright (2) Commercial products (2) Capital (2) Authors (2) Americans (2) Exhibitions (2) Prices (2) Population (2) Labor productivity (2)