A patent examiner’s field of search should be comprehensive and include various elements as outlined in MPEP 904.02(a): Classification locations where the claimed subject matter would be properly classified Every relevant group/subgroup of the Cooperative Patent Classification (CPC) Relevant class/subclass of the U.S. Patent Classification (USPC) Digests and cross-reference art collections Classifications assigned by foreign…

When outlining a field of search, a patent examiner should follow specific guidelines as outlined in MPEP 904.02(a): “In outlining a field of search, the examiner should note every classification location (i.e. group/subgroup of the Cooperative Patent Classification and/or class/subclass of the U.S. Patent Classification) under the utilized classification system and other organized systems of…