Ninth Circuit Acknowledges That Its Precedent On Functionality Is "Less Than Clear"

Plaintiff Moldex-Metric had used a bright green color to identify its earplugs since 1982. After defendant McKeon Products started selling earplugs in a bright green color, plaintiff sued for trademark infringement. The parties filed cross-motions for summary judgment on the issue of functionality.

To determine whether the color green was functional for earplugs, the district court relied on the four-factor test set forth by the Ninth Circuit in Disc Golf Ass'n v. Champion Discs, Inc., 158 F.3d 1002, 1006 (9th Cir. 1998). That test considers (1) whether advertising touts the utilitarian advantages of the color, (2) whether the particular color results from a comparatively simple or inexpensive method of manufacture, (3) whether the color yields a utilitarian advantage, and (4) whether alternative colors are available.