"Aureka Themescape" is proprietary software that corporations use

    to analyze patents, it literally renders a patent landscape as a
    topographical map representing frequecy of topics.  You can then
    plot points based on other characteristics of a patent (inventor,
    corporation, scientic publication, claims, etc.). 

ThemeScape uses three main algorithms to analyse the words used in patents, and to identify themes and relationships between documents, in a four-step process of harvesting, analysing, clustering, and mapping.

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