Patent Classification Systems and Technological Categorization: An Overview and Update

16 Pages Posted: 2 Aug 2018 Last revised: 8 Jan 2019

See all articles by Lucy Xiaolu Wang

Lucy Xiaolu Wang

Cornell University - Department of Economics

Date Written: January 1, 2019

Abstract

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

Suggested Citation

Wang, Lucy Xiaolu, Patent Classification Systems and Technological Categorization: An Overview and Update (January 1, 2019). Available at SSRN: https://ssrn.com/abstract=3220033 or http://dx.doi.org/10.2139/ssrn.3220033

Lucy Xiaolu Wang (Contact Author)

Cornell University - Department of Economics ( email )

Ithaca, NY 14853
United States

HOME PAGE: http://www.lucyxiaoluwang.com

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