The treatment of functional features in design patents was discussed in the recent Federal Circuit case for Sport Dimension, Inc. v. The Coleman Company, Inc., Case No. 15-1553 (Fed. Cir. 2016).  The Court rejected the district court’s claim construction, which completely removed functional features.

As noted by the Court, “[a] design patent cannot claim

An industrial design generally constitutes the ornamental or aesthetic aspects of various articles, such as the three dimensional features (e.g., shapes) or two dimensional features (e.g., patterns, lines or colors) of packages, containers, furniture, household goods, lighting equipment, jewelry, electronic devices, and textiles. Industrial designs can be protected in many countries by a design patent.