37 CFR 41.33 : Patents, Trademarks, And Copyrights (Section 2.11 To Chapter V) — United States Patent And Trademark Office, Department Of Commerce (Parts 1 - 199) (Section 2.11 To Parts 151-199) — Unknown Title (Parts 2 - 90) (Section 2.11 To Section 90.3) — Practice Before The Patent Trial And Appeal Board (Section 41.1 To Section 41.208) — Ex Parte Appeals (Section 41.30 To Section 41.54) — Amendments and affidavits or other Evidence after appeal.