Under CopyrightJonkers, KoenFrietsch, RainerRainerFrietschNeuhäusler, PeterPeterNeuhäuslerRothengatter, OliverOliverRothengatter2022-03-0730.4.20162016https://publica.fraunhofer.de/handle/publica/29777610.24406/publica-fhg-297776en303600Societal grand challenges from a technological perspective - Methods and identification of classes of the International Patent Classification IPCreport