U.S. Net Patent Citation Flows, 1963-2002

This Demonstration uses the patent citations datasets compiled by B. H. Hall, A. B. Jaffe, and M. Tratjenberg (2001) comprising more than 3 million U.S. patents (and more than 16 million citations) granted between January 1963 and December 2002. This Demonstration allows the user to select the time frame for the selection of the data, and to consider either up- or down-citations. The arrows in this Demonstration are scaled by the number of net citations between the two technology categories over the selected time period, while the size of the yellow disks representing each category are scaled by the number of patents granted during that time period.

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