Abstract
This report analyses whether entry of UK enterprises into patenting in a technology area is affected by patent thickets in the technology area.The aim is to contribute to our understanding of the role of patent thickets as a barrier to entry into new technologies for UK enterprises, in particular small and medium sized enterprises (SMEs).The report consists of several parts:1) A review of the literature on patent thickets, including the limited empirical evidence regarding effects of patent thickets on RD2) Discussion of the factors contributing to thicket formation and growth;3) An empirical evaluation of the extent to which patent thickets appear to be barriers to entry in some technology areas.
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