Ribeiro, Leonardo Costa; Ruiz, Ricardo Machado; … - Centro de Desenvolvimento e Planejamento Regional … - 2008
Scientific and other non-patent references (NPRs) in patents are important tools to analyze interactions between science and technology. This paper organizes a database with 514,894 USPTO patents granted globally in 1974, 1982, 1990, 1998 and 2006. There are 165,762 patents with at least one...