In re Campbell

"district court applied an erroneous legal standard in finding no likelihood of confusion, thereby stripping that determination of the protection normally accorded fact findings" | “district court applied an erroneous legal standard in finding no likelihood of confusion, thereby stripping that determination of the protection normally accorded fact findings” | “particular hues of [] colors, arranged in certain geometric designs, presented in conjunction with a particular style of printing,” taken together, create distinctive visual impression | clearly erroneous standard of review inapplicable to finding of no likelihood of confusion in trademark case where trial court “misapplied one critical legal standard” in making subsidiary fact determination