PatentScope now offers a mobile search interface. As far as I know, this is the first patent office database optimized for mobile devices.
Also read that WIPO is planning to add "the bulk" of patent data from the IP5 patent offices, e.g. EPO, USPTO, JPO, SIPO and KIPO, to PatentScope in 2011. The EPO data was added a couple of months ago.
This will be a great addition to an already excellent tool.
2016 Patent Market Size and Conclusions
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