37 CFR § 1.110 - Inventorship and ownership of the subject matter of individual claims.

---
identifier: "/us/cfr/t37/s1.110"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "37 CFR § 1.110 - Inventorship and ownership of the subject matter of individual claims."
title_number: 37
title_name: "Patents, Trademarks, and Copyrights"
section_number: "1.110"
section_name: "Inventorship and ownership of the subject matter of individual claims."
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"
---


# 1.110 Inventorship and ownership of the subject matter of individual claims.

When one or more joint inventors are named in an application or patent, the Office may require an applicant or patentee to identify the inventorship and ownership or obligation to assign ownership, of each claimed invention on its effective filing date (as defined in § 1.109) or on its date of invention, as applicable, when necessary for purposes of an Office proceeding. The Office may also require an applicant or patentee to identify the invention dates of the subject matter of each claim when necessary for purposes of an Office proceeding.

[78 FR 11058, Feb. 14, 2013]