---
kind: "unit"
title: "37"
title_heading: "Patents, Trademarks, and Copyrights"
key: "chI/subchA"
level: "subchap"
label: "Subchapter A"
heading: "General"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/37/chI-subchA"
sections_count: 885
---

# Subchapter A — General

Title 37 C.F.R. — Patents, Trademarks, and Copyrights › Chapter I — United States Patent and Trademark Office, Department of Commerce

## Contents

- [Part 1 — Rules of Practice in Patent Cases](/cfr/37/chI-subchA-part1.md)
- [Part 3 — Assignment, Recording and Rights of Assignee](/cfr/37/chI-subchA-part3.md)
- [Part 4 — Complaints Regarding Invention Promoters](/cfr/37/chI-subchA-part4.md)
- [Part 5 — Secrecy of Certain Inventions and Licenses to Export and File Applications in Foreign Countries](/cfr/37/chI-subchA-part5.md)
- [Part 2 — Rules of Practice in Trademark Cases](/cfr/37/chI-subchA-part2.md)
- [Part 6 — Classification of Goods and Services under the Trademark Act](/cfr/37/chI-subchA-part6.md)
- [Part 7 — Rules of Practice in Filings Pursuant to the Protocol Relating to the Madrid Agreement Concerning the International Registration of Marks](/cfr/37/chI-subchA-part7.md)
- [Part 10 — Part 10 [reserved]](/cfr/37/chI-subchA-part10.md)
- [Part 11 — Representation of Others Before the United States Patent and Trademark Office](/cfr/37/chI-subchA-part11.md)
- [Part 15-15a — PARTS 15-15a [RESERVED]](/cfr/37/chI-subchA-part15-15a.md)
- [Part 41 — Practice Before the Patent Trial and Appeal Board](/cfr/37/chI-subchA-part41.md)
- [Part 42 — Trial Practice Before the Patent Trial and Appeal Board](/cfr/37/chI-subchA-part42.md)
- [Part 43 — Decision Circulation and Review Within the Patent Trial and Appeal Board](/cfr/37/chI-subchA-part43.md)
- [Part 90 — Judicial Review of Patent Trial and Appeal Board Decisions](/cfr/37/chI-subchA-part90.md)