Download different versions of the CD index computed for U.S. patents.

Pre-computed index values for U.S. patents

Values computed using the United States Patent and Trademark Office PatentsView data (December 26, 2017 release)
  • Patent cross section
  • Patent panel
  • Data documentation
  • Due to a bug in the PatentsView data, previous posting of the above data (available between February 12, 2019 and May 22, 2019) were missing some patents granted in 1998. In addition, a small number of citations in the PatentsView data were found to be duplicates. These issues have been corrected.
Values computed using the Harvard Patent Dataverse data (2010 release)