This week the WIPO formally announced the newest feature in its PatentScope database: the ability to display search results in graphic format. The tool has been available in beta version for several months.
The tool converts search results into four graphic charts: 1) year of publication, 2) country of publication, 3) applicant name (first named) and 4) IPC subclass. This is the first public patent database that (to the best of my knowledge) has a search results graphical display capability.