the Sources of Innovation: The Case of Scientific Instruments." Research Policy 23, no. 4: 459-469. Autore: Eric von Hippel Copy Quote More from Eric von Hippel “Then I remembered the "Chip," a small experimental board we had built with foot…” “1978 Jurgen Honscheid came over from West Germany for the first Hawaiian World …” “high-performance windsurfing techniques and equipment in Hawaii by an informal …” “informal user group. High-performance windsurfing involves acrobatics such as j…”