U.S. Code / Title 35 — Patents / Part I—United States Patent and Trademark…Title 35ChapterChapter 3—Practice Before Patent and Trademark OfficeContents[§31. Repealed. Pub. L. 106–113, div. B, §1000(a)(9) [title IV, §4715(b)], Nov. 29, 1999, 113 Stat. 1536, 1501A–580]§ 32. Suspension or exclusion from practice§ 33. Unauthorized representation as practitioner