37 CFR § 1.74 - Reference to drawings.

---
identifier: "/us/cfr/t37/s1.74"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "37 CFR § 1.74 - Reference to drawings."
title_number: 37
title_name: "Patents, Trademarks, and Copyrights"
section_number: "1.74"
section_name: "Reference to 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"
---


# 1.74 Reference to drawings.

When there are drawings, there shall be a brief description of the several views of the drawings and the detailed description of the invention shall refer to the different views by specifying the numbers of the figures and to the different parts by use of reference letters or numerals (preferably the latter).