While this seems like a simple question that should have a straightforward answer, the true analysis involved a multi-factor test where each factor must be evaluated separately, and then after each factor-specific analysis is performed, those analyses must be viewed collectively, or “in the totality of the circumstances.” After the collective analysis, a determination as to whether a “likelihood of confusion exists” can be made.
The DuPont Factors – Analysis under Section 2(d) of The Lanham Act (Trademark Act of 1946)
When comparing whether a “likelihood of confusion” exists between two trademarks, a multi-factor test is employed. While each jurisdiction has a specific set of factors that get used, the United States Patent and Trademark Office (USPTO) uses the factors set forth in In re E.I. du Pont de Nemours & Co so these “likelihood of confusion” factors are commonly referred to as the “DuPont Factors.”