A Supreme Court case to be heard this spring could have the justices dropping the F-bomb. The justices last week agreed to hear a challenge to trademark law involving a clothing brand named “FUCT” — leaving court watchers wondering how the justices will handle oral argument. The U.S. Patent and Trademark Office says the name appeared to be intended as a homonym for a vulgarity, and thus violates a federal law prohibiting “scandalous” trademarks. On that basis, PTO refused to register the trademark. Designer Erik Brunetti sued and won the first round in court, but in an unusual move both...