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WIPO Pearl
"WIPO’s multilingual terminology portal gives access to scientific and technical terms derived from patent documents...
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New patent classification system
The previous seven technical fields related to the 4th Industrial Revolution* have been expanded and improved to 16 technical fields** and added to the advanced patent classification (CPC) system...
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Classification of the German Patent and Trademark Office (DEKLA)
Extension of the International Patent Classification published and internally used by the German Patent Office....
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Patent and Registration Office Thesaurus
"Thesaurus is a database of selected and controlled subject that is partly organized hierarchically...
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European Classification System
"The European Classification System (ECLA) is an extension of the IPC and is used by the EPO...
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Derwent World Patents Index Classification System
"Companies often use different names for the same invention, and additional variation may be introduced when the patent application is translated into different languages...
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International Patent Classification
"The International Patent Classification (IPC), established by the Strasbourg Agreement 1971, provides for a hierarchical system of language independent symbols for the classification of patents and utility models according to the different areas of technology to which they pertain...
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United States Patent Classification
"The USPC is a system for organizing all U.S...
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Cooperative Patent Classification
"The Cooperative Patent Classification (CPC) effort is a joint partnership between the United States Patent and Trademark Office (USPTO) and the European Patent Office (EPO) where the Offices have agreed to harmonize their existing classification systems (European Classification (ECLA) and United States Patent Classification (USPC) respectively) and migrate towards a common classification scheme."...
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