classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9914924-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2015232840-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9631050-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8901074-B2 |