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The Dynamics of the Transfer and Renewal of Patents

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  • Carlos J. Serrano

Abstract

This paper explores a new dataset of transfers of patents recorded at the United States Patent and Trademark Office. The aim of the paper is twofold. First, a number of patterns are presented. For instance, the probability of a patent being traded monotonically decreases as a function of its age except at the renewal dates. Immediately after renewal, this probability discontinuously increases. Among patents of the same age, the probability of being traded and the probability of being renewed is increasing in the total number of citations received. Moreover, previously traded patents, and especially the recently traded, are more likely to be traded and less likely to be allowed to expire than patents not previously traded. Second, the paper extends Pakes and Schankerman\\'s patent renewal framework in order to develop a model of the transfer and renewal of patents. Two new key features of the model are motivated by the patterns documented: gains from reallocating patents to more productive firms and costs of adopting technology.

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Bibliographic Info

Paper provided by University of Toronto, Department of Economics in its series Working Papers with number tecipa-227.

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Length: 68 pages
Date of creation: 11 Mar 2006
Date of revision:
Handle: RePEc:tor:tecipa:tecipa-227

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Keywords: Markets for Technology; Patents; Transfer of Patents;

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References

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