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The “Ordinary Observer” Test and Design Patents

Patents for designs
Must be associated
With physical things

clip_image002Unlike utility patents, which cover new or improved — and useful — products, processes, or machines, design patents cover only cosmetic, non-functional elements of an object.

In Curver Luxembourg SARL v. Home Expressions, Inc., the Federal Circuit dealt with an “ornamental design for a pattern for a chair,” as shown above.

The patent holder alleged that the design patent was infringed by a similar plastic basket.

The company that sold the baskets, Home Expressions, argued that the baskets couldn’t infringe the design patent because the patent was limited to chairs only.

The Federal Circuit agreed with Home Expressions.

As the court explained,

To determine whether the complaint stated a plausible infringement claim, the district court conducted a two-step analysis. First, it construed the scope of the design patent. Second, it compared the accused products to the claimed design as construed to determine whether the products infringed. Under the “ordinary observer” test, an accused product infringes a design patent if “in the eye of an ordinary observer . . . two designs are substantially the same,” such that “the resemblance is such as to deceive such an observer, inducing him to purchase one supposing it to be the other . . . .”

The court noted that the district court

construed the scope of the … patent to be limited to the design pattern illustrated in the patent figures as applied to a chair, explaining that “[t]he scope of a design patent is limited to the ‘article of manufacture’— i.e., the product—listed in the patent.”

The district court found that no “ordinary observer” would buy a Home Expressions basket believing that it was a chair.

None of the previous cases, noted the court, “confront the atypical situation we have here, where all of the drawings fail to depict an article of manufacture for the ornamental design.”

Since the drawings didn’t show the article in question, the issue became whether the claim language specifying an article of manufacture could limit the scope of a design patent.

The court held that it could:

Given that long-standing precedent, unchallenged regulation, and agency practice all consistently support the view that design patents are granted only for a design applied to an article of manufacture, and not a design per se, we hold that claim language can limit the scope of a design patent where the claim language supplies the only instance of an article of manufacture that appears nowhere in the figures.

(Emphasis added.)


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