The German Patent Classification (DPK)
The classification schemes of the German Patent Classification (DPK) can be accessed in English, Swedish or German.
The English and Swedish language versions contain a comprehensive listing of all the classification entries from different editions that are used in the database.
The German language version contains pages from different editions of the schemes. However, we cannot guarantee that it contains every classification entry that is actually used in the database. Please note that the format of the classification symbols in the German language version differs from the format used in the Swedish Patent Database.