Patent Search Results IPC v CPC

Patent Databases have a clever and very useful targeted Classification Systems, the two most important ones are called the International Patent Classification (IPC) or the Cooperative Patent Classification (CPC). Instead of using text to find relevant documents, you can use a classification code which can be very specific for a particular invention, e.g. a useful CPC for RNA related vaccines is A61K2039/53

These two Classification systems are similar but not identical and although I prefer the CPC system, the IPC set can find further new documents.

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