MPEP § fp8.11
[1]. Claim [2], drawn to [3], classified in [4].
1. In bracket 1, insert the appropriate roman numeral, e.g., --V--, --VI--, etc.
2. In bracket 4, insert CPC subclass and main group/subgroup if classified in the Cooperative Patent Classification or USPC class and subclass if classified in the United States Patent Classification or. For example, if examined in CPC, enter CPC main group xxx, subgroup yyy.