Citations represent added value from the patent office which we can use to help formulate better patent searches. Importantly, citations provide a language-independent search tool. This is of increasing importance in our global economy where applications are published around the world in many different languages. Links between cited references are now available in many databases free and fee-based and those links between patents related by subject can be exploited in a search to improve both relevance and recall. Cited references can provide access to older documents, which cannot be keyword searched or where terminology has changed.
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