101 Iowa L. Rev. 1535 (2016)
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The patent system is usually described in terms of opposites, like producers versus trolls or software versus pharma. But the reality is a far more complex set of layers, including enforcers, patentees, and technology. This study of 25 years of patent litigation by highly litigious non-practicing entities (“NPEs”) and randomly selected plaintiffs explores each of these layers and shows ways that each interacts with the others, using patent validity as a primary exemplar.

Data related to more than 1000 patent outcomes in more than 2000 cases leads to some surprising findings. For example, while the litigious NPEs enforced many patents from product companies and public companies, the patents enforced by random companies were more likely to come from larger and better-funded companies. Additionally, the data implies that patents obtained by individuals fared worse in litigation, regardless of who enforced them. Most surprisingly, once patentee and enforcer type is considered, software patents are no longer a statistically significant predictor of invalidation.

The layering of the system shows that simple stories describing one layer at a time cannot answer the questions that face the patent system. The interconnections between the layers of the patent system point the way.

Sunday, May 15, 2016