Predicate |
Object |
title |
Packers; Plugs |
label |
E21B33/12 |
sameAs |
http://www.wipo.int/classifications/ipc/ipcpub/?notion=scheme&symbol=E21B0033120000 http://data.epo.org/linked-data/def/ipc/E21B33-12 |
broader |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B33-10 |