A design patent covers the unique, ornamental, or visible shape or surface ornamentation of an article or object, even if only on a computer screen. Thus if a lamp, a building, a computer case, or a desk has a truly unique shape, its design can be design patented. Even computer screen icons and an arrangement of printing on a piece of paper can be patented. A design must be for an article that is different from an object in its natural state; thus a figure of a man would not be suitable for a design patent but if the man is in an unnatural position, this can be patented. The uniqueness of the shape must be purely ornamental or aesthetic and part of an article. If the design is functional, then only a utility patent is proper, even if it is also aesthetic. A good example is a jet plane with a constricted waist (narrow body) for reducing turbulence at supersonic speeds: Although the novel shape is attractive, its functionality makes it suitable for a utility patent only. A useful way to distinguish between a design and a utility invention is to ask, "Will removing or smoothing out the novel features substantially impair the function of the device?" If so, as in the jet plane with the narrowed body, this proves that the novel features have a significant functional purpose, so a utility patent in indicated. According to David Pressman's book "Patent it Yourself" two useful questions to ask to define design innovations are: (1) Is the novel feature(s) there for structural or functional reasons, or only for the purpose of ornamentation? (2) Does the novel feature make it look better or work better? (The utilitarian function always prevails.) If the state of the arts is such that the general nature of the feature and its function is old, but the feature has a novel shape that is an aesthetic improvement, then only a design patent will be proper. The design patent application must consist primarily of drawings, along with formal paperwork and a filing fee. Design patents last 14 years from the date of issuance.

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