2026-05-01T01:54:42Z https://datacatalogue.cessda.eu/oai-pmh/v0/oai

22f221e2a93200b2055697c6f735320084aae339e53f4cb688bbbcd82f90eaeb 2026-03-09T02:18:43Z language:enopenaire_data

CPC subclass reclassification CPC subclass reclassification doi:10.17026/SS/MEV4KE P. Persoon DANS Data Station Social Sciences and Humanities PATENTSSocial Sciences Three datasets are included, each corresponding to a different moment of CPC reclassification: 2013/2016, 2016/2019, 2019/2023. Each dataset includes the number of docdb patent families (with at least one US member and size greater than 1) of each subclass before reclassification (n), the number of classifications added (rp), and the number of classifications deleted (rn) for each earliest filing year between 1985 and 2019. https://ssh.datastations.nl/oai doi:10.17026/SS/MEV4KE 2026-03-03T01:00:51Z ddi:codebook:2_5