Trade Dress and the Functionality Doctrine: At the Intersection of Trademark and Patent Law
Trade dress -- the visual appearance of a product or its packaging that signifies the source of the product to consumers -- is protected under trademark law. However, if a product feature is determined to be functional, then that feature is not protected by trademark law. The only way to protect a functional feature of a product's design is under patent law. A product feature is functional if it is essential to the use or purpose of the product or affects the cost or quality of the product. To put it simply, a feature is functional if it is the reason the device works as opposed to being merely ornamental. Sometimes the distinction is difficult to determine.
One of the issues on appeal was the effect of the utility patents that plaintiff had obtained on the same product. The Supreme Court has held that a utility patent is strong evidence that the features claimed therein are functional, and thus not protectable trade dress. The plaintiff argued, however, that its utility patents covered the manufacturing process and materials, but did not pertain to a particular embossing pattern, which was the aspect of the product that plaintiff argued was protected as trade dress. The Fourth Circuit noted that the diagrams on the utility patents show hexagonal shapes, rather than the circular dots or pixels depicted in the trademark.
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The case demonstrates an interesting area of intellectual property law that is at the crossroads of trademarks and patents.
The case is McAirlaids, Inc. v. Kimberly-Clark Corporation, --- F.3d --- (4th Cir. June 25, 2014).
Labels: fourth circuit, functional, infringement, intellectual property law, judge wilson, Lanham Act, patent, trade dress, trademark, utility patent, western district of virginia