Abstract

Recent examples of patent litigation show the evidence of firms strategic pa tent use. Thus forecasting patent litigation becomes a greater priority. Patent citations have been prevalent in its usa ge in analyzing business environment as diverse patent indicators or a tool to predict patent litigation. However, most previous re search has considered only direct patent citations. In order to overcome the limitation, this study analyzes patent litigation quantitatively throug h three kinds of patent citations: direct, indirect and latent citation, and empirically analyzed the relationship between these citations and patent litigation between plaintiff and defendant firms based on U.S. patent documents and patent litigation information. Co nsequently, this study found that the indirect citation is more by 7% than direct citations to patent litigation. In addition, latent citation is 8% highe r in frequency compared with the number of litigations in in/direct citation relationship. Therefore, these results indicate tha t various approach for patent citation can provide more information for forecasting patent litigation.

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