Like all expert opinion testimony, an expert’s survey-based opinions in trademark cases are only admissible if they meet the standards set forth in Fed. R. Evid. 702 and Fed. R. Evid. 403. Rule 702 codifies the Daubert requirement for admissibility of scientific evidence. Rule 403 allows a court to exclude evidence if its probative value is substantially outweighed by a danger of, among other things, “unfair prejudice, confusing the issues, [or] misleading the jury.”

Full Article Available Here