合理使用
Consistent with the limited nature of trademark protection and the free speech guarantees of the First Amendment, U.S. law provides for a fair use defense to trademark infringement. Fair use in trademark law does not employ the same four-pronged analysis used in copyright law. The law recognizes two fair use defenses: classic fair use, where the alleged infringer is using the mark to describe accurately an aspect of its products; and nominative fair use, in which the trademark is being used to actually refer to the trademarked product or trademark owner.