37 CFR § 1.437 - The drawings.

---
identifier: "/us/cfr/t37/s1.437"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "37 CFR § 1.437 - The drawings."
title_number: 37
title_name: "Patents, Trademarks, and Copyrights"
section_number: "1.437"
section_name: "The drawings."
chapter_name: "UNITED STATES PATENT AND TRADEMARK OFFICE, DEPARTMENT OF COMMERCE"
subchapter_number: "A"
subchapter_name: "GENERAL"
part_number: "1"
part_name: "RULES OF PRACTICE IN PATENT CASES"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "35 U.S.C. 2(b)(2), unless otherwise noted."
regulatory_source: "24 FR 10332, Dec. 22, 1959, unless otherwise noted."
cfr_part: "1"
---


# 1.437 The drawings.

(a) Drawings are required when they are necessary for the understanding of the invention (PCT Art. 7).

(b) The physical requirements for drawings are set forth in PCT Rule 11 and shall be adhered to.

[72 FR 51563, Sept. 10, 2007]