To gain registration in the Principal Register or common law protection under the Lanham Act, a trade dress must not be "functional". That is, the configuration of shapes, designs, colors, or materials that make up the trade dress in question must not serve a utility or function outside of creating recognition in the consumer's mind. For example, even though consumers associated a distinct spring design for wind resistant road signs with a particular company, the spring design was not protectable for trade dress purposes because the springs served the function of withstanding heavy wind conditions.
To gain registration in the Principal Register or common law protection under the Lanham Act, a trade dress must not be "functional". That is, the configuration of shapes, designs, colors, or materials that make up the trade dress in question must not serve a utility or function outside of creating recognition in the consumer's mind. For example, even though consumers associated a distinct spring design for wind resistant road signs with a particular company, the spring design was not protectable for trade dress purposes because the springs served the function of withstanding heavy wind conditions