Posts Tagged: "third-party trademark use"

When examining trademark applications, the U.S. Patent and Trademark Office (USPTO) assesses whether the applied-for trademark presents a likelihood of confusion among consumers as compared to other registered U.S. trademarks. In making this determination, the USPTO considers a list of factors first laid out in In re E. I. du Pont de Nemours & Co. 476 F.2d 1357 (C.C.P.A. 1973), commonly referred to as the Du Pont factors. One of the Du Pont factors is the number and nature of similar marks in use by third parties on similar goods or services. Id. at 1361. This article examines the significance of third-party usage evidence to a likelihood of confusion analysis.