FIGURE C.4 Share of various countries in 2000 based on the country of residence of the inventors. The bars show the data for applications lodged in 2000 at the USPTO, EPO, and JPO. The diamonds show the same information for 1991. U.S. inventors are the largest grouping, accounting for 34.3 percent of applicants, similar to their 1991 share. Between 1991 and 2000 the EU’s share increased by a percentage point, to 31.4 percent, whereas Japan’s share declined by around 3 percentage points, to 26.9 percent. (Note that the percentages do not add to 100. This is due to the double counting of EU members.) SOURCE: OECD, Compendium of Patent Statistics 2004, © 2004.

subfields. Notwithstanding the weaknesses associated with a one-patent-office methodology, such a methodology can be useful in understanding the extent to which U.S. dominance has changed over time. The data were gathered from the online USPTO database.1

Patents of interest were identified by their associated international (World Intellectual Property Organization) category or by searching for a keyword in the patent title. The number of inventors from countries with well-established and


The search engine on the EPO Web page did not allow for a similar data-mining exercise on EPO data.

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