Patent Classification Systems and Technological Categorization: An Overview and Update
16 Pages Posted: 2 Aug 2018 Last revised: 16 Sep 2019
Date Written: January 1, 2019
Patent classification systems and upper-level groupings have been widely used for research and entrepreneurial purposes but are insufficiently documented. This article provides an overview of the major patent classification systems and the basic ideas behind categorization of patent classes. I highlight recent institutional changes that disproportionately affect patents in specific categories and alternative categorizations used in the patent examination process. Finally, I update the National Bureau of Economic Research patent technological categorization based on the latest U.S. patent classification.
Keywords: patent classification systems, intellectual property, technological categorization
JEL Classification: O3
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