15.7 Infringement-Elements and Burden of Proof-Trade Dress is a legal concept which protects distinguishing features of a product or service from being copied by competitors. This is known as trade dress protection and is related to trademark law. There are two elements that must be established in order to succeed in a trade dress claim: 1) secondary meaning and 2) non-functionality. Secondary meaning is established when a product or service has acquired distinctiveness in the public's mind, so that it is uniquely associated with the product's or service's source. Non-functionality is established when the trade dress does not serve a utilitarian purpose in the product or service, but instead is used to distinguish the product from others and create a unique identity. The burden of proof for trade dress infringement lies with the plaintiff, who must demonstrate that the trade dress is non-functional and has acquired secondary meaning.