Patents German classification

Each country has had its own classification i stem or systems, each of which differs from all other systems, except that some countries—for example, Austria, Denmark, Holland, Norway, and Sweden—adopted systems based on and similar to the German classification. The British collection does not include a set of classified patents, but has instead bound sets of Abridgements in classified groups or classes. 

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). 

An important step forward has been the recent introduction of an international classification system for patents (184). Each British, German, and Australian patent now carries the class and subclass under this system as well as that imder the national classification. As discussed below, under French Patents, this system has been adopted and is now used in France. 

The German publication corresponding to the United States Patent Gazette is the Ausziige section of the weekly Patentblatt. The latter contains various lists relating to patent applications and patents. The Ausziige presents the patent information in the order of the subject classification. 

The thorough annual indexes (Verzeichnis) contain a number of sections enabling the searcher to obtain complete data fairly readily starting from a knowledge of only the patent number, or the patent application number, or the applicant s name, or the classification. The Manual of Foreign Patents (263) contains an especially clear presentation concerning the German patent publications. 

The Austrian, Gzechoslovakian, Danish, Dutch, Finnish, Hungarian, Norwegian, Polish, and Swedish classifications are based on the German. Generally, the main classes are identical, but ithe subdivision of the classes is not so extensive. The Swedish Patent Ofiice in December 1948 published a revised classification manual (197), The Patent Ofiice sets of the patents of these countries are also supplemented by useful yearly indexes. 

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

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. 

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 ... 

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