---
kind: "unit"
title: "35"
title_heading: "Patents"
key: "ptIV"
level: "part"
label: "Part IV"
heading: "Patent Cooperation Treaty"
release: "119-102"
url: "https://uscodex.org/usc/35/ptIV"
sections_count: 15
---

# Part IV — Patent Cooperation Treaty

Title 35 — Patents

## Contents

- [Chapter 35 — Definitions](/usc/35/ptIV-ch35.md)
- [Chapter 36 — International Stage](/usc/35/ptIV-ch36.md)
- [Chapter 37 — National Stage](/usc/35/ptIV-ch37.md)