15.14 Infringement-Elements-Ownership-Priority Through Tacking refers to a legal concept that allows a trademark owner to claim priority of rights in a trademark based on earlier use of a similar mark. It is a form of trademark priority that applies when a trademark owner has continuously used the same mark or a similar mark for a period of time. The concept of tacking can be used to determine priority of rights when the marks have a high degree of similarity and when the owner of the earlier mark has made a continuous use of the same or a similar mark. Tacking is recognized in the United States by the Federal Circuit Court of Appeals and may be used to maintain trademark rights, even when the two marks are not identical. Types of 15.14 Infringement-Elements-Ownership-Priority Through Tacking include literal tacking, a name change due to marriage, and a minor change in the mark.