15 U.S.C. § 1055
Section 1055 · Use by related companies affecting validity and registration
This is § 5 of the Trademark Act of 1946 (Lanham Act)
Amended 2 times on record
Applied in 86 court decisions — leading case Siegel v. Chicken Delight, Inc. (1971)
Most recently applied in Jekyll Island-State Park Authority v. Polygroup Macau Limited (June 2025)
How often courts cite this section
Court decisions citing this, by year.Markers show enactment, consequential amendments, and circuit splits over this section — watch for a citation surge after a change or a disagreement. The dip in the last several years is a data-coverage gap, not a real trend — our corpus holds fewer opinions from the most recent years, so recent citations are undercounted.
Where a registered mark or a mark sought to be registered is or may be used legitimately by related companies, such use shall inure to the benefit of the registrant or applicant for registration, and such use shall not affect the validity of such mark or of its registration, provided such mark is not used in such manner as to deceive the public. If first use of a mark by a person is controlled by the registrant or applicant for registration of the mark with respect to the nature and quality of the goods or services, such first use shall inure to the benefit of the registrant or applicant, as the case may be.
Editorial notes U.S. Code · Office of the Law Revision Counsel
Amendments
1988—Pub. L. 100–667 inserted at end “If first use of a mark by a person is controlled by the registrant or applicant for registration of the mark with respect to the nature and quality of the goods or services, such first use shall inure to the benefit of the registrant or applicant, as the case may be.”
Effective Date of 1988 Amendment
Amendment by Pub. L. 100–667 effective one year after Nov. 16, 1988, see section 136 of Pub. L. 100–667, set out as a note under section 1051 of this title.
Repeal and Effect on Existing Rights
Repeal of inconsistent provisions, effect of this chapter on pending proceedings and existing registrations and rights under prior acts, see notes set out under section 1051 of this title.