What is a “cross-reference art collection” in patent searching?

A “cross-reference art collection” in patent searching refers to a grouping of patent documents that are relevant to a particular subject matter but do not fit neatly into a single classification. The MPEP 904.02(a) states:

“Cross-reference art collections, if any, associated with the class or subclass are also included in the search (MPEP § 903.07).”

These collections allow examiners to find relevant prior art that may be classified in multiple areas, enhancing the thoroughness of the search process. When conducting a classified search, it’s important to consider these cross-reference collections to ensure a comprehensive review of potential prior art.

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Tags: Classification, cross-reference art collection, patent searching, prior art