If two applications on the same register would result in registrations that are exact duplicates, the Office will permit only one application to mature into registration, and will refuse registration in the other application.
37 C.F.R. §2.48
Part 3 pertaining to both patents and trademarks is placed in the grouping pertaining to patents regulations.
Part 4 is placed in the separate grouping of parts pertaining to patents regulations.
Part 5 is placed in the separate grouping of parts pertaining to patents regulations.