German Patent Office Classification

German, in 1947. A list of the PB numbers of these 22 volumes is available from the OTS (22). The abstracts are grouped by the German Patent Office classification in very broad classes. A subject outline of the classification correlated with the PB volumes and pages on which the abstracts of the patents occur has been prepared ( 3). The German patent classification is also given in an index published by the Special Libraries Association (33). 

Lovett, G. A., Manual of Classification of the German Patent Office, Government Printing Office, Washington, 1911. 

End-of-pipe technologies are recorded by the German Patent Office in the class C02F of the International Patent Classification (IPC) Treatment of water, waste water, sewage or sludge. This class is further divided into six subclasses ... 

The Austrian, Danish, Dutch, Norwegian, and Swedish classifications are based on the German. Generally, the main classes are identical, but the subdivision of the classes is not so extensive. The Swedish Patent Office in December 1948 published a revised classification manual 179). The Patent Office sets of the patents of these countries are also supplemented by useful yearly indexes. 

Similar publications are issued by the patent offices of all countries. The German Deutsches Patentamt for instance lists its patents in the weekly Patentblatt in classified order. Abstracts can be found in the privately published Amziige aus den Patent-schriften, while the Gruppeneinteilung der Patentklassen gives the detailed classification of the 89 classes. A quarterly name index, the Namenverzeichnis, is available. 

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