How can I find the name of a particular IPC class? From http://www.wipo.int/ipcpub/#refresh=page¬ion=scheme&version=19680901 I cannot find, for example, the name of the IPC class "A02K" and others that appear in the NBER patent data project dataset.
http://www.wipo.int/ipcpub/#refresh=page¬ion=scheme&version=19680901