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German Patent Classification : ウィキペディア英語版 | German Patent Classification The German Patent Classification is a patent classification system that was used in several European countries. ==History== The German Patent Office (German: ''Kaiserliches Patentamt'') started developing a classification system for its patent documents in 1877.〔 * (Introduction to the German Patent Classification (DPK) ) at the Swedish Patent and Trademark Office (PRV)〕 It was greatly expanded during the following decades and was published in seven editions between 1906 and 1958, first as "''Verzeichnis der deutschen Patentklassen''" and later as "''Gruppeneinteilung der Patentklassen''". The abbreviation DPK (for Deutsche Patentklassifikation) is often used, for example in some databases.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「German Patent Classification」の詳細全文を読む
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