FORT LAUDERDALE, Fla. (AP) _ A federal jury Monday awarded $50 million to CarMax Group, the nation's second biggest used-car chain, in a trademark lawsuit against Republic Industries Inc. over the AutoNation USA name.

Despite the decision to award punitive damages, a Republic spokesman said jurors also found there was no infringement of any CarMax trademarks or slogans.

``We don't think the $50 million is something we should have to pay, since the jury did not find trademark infringement,'' said Jim Donahue, a Republic spokesman.

Howard Schwartz, Republic's vice president and deputy general counsel, said Republic would file motions seeking clarification of the verdict.

CarMax attorneys noted AutoNation was hit with punitive damages in its own hometown.

``Any spin they want to put on it, a jury hit them with $50 million in punitive damages,'' said CarMax attorney Richard Knoth.

AutoNation, based in Fort Lauderdale, is the nation's largest used-car superstore chain. The subsidiary of Republic has 39 dealerships, compared with 24 for CarMax.

At issue in the case was Richmond, Va.-based CarMax's charge Republic violated the trademarks for CarMax's AutoMation computer-shopping system _ and its jingle, ``The New Way to Buy Used Cars.''

The suit grew out of CarMax's opposition to Republic's attempt to register the AutoNation USA name and the slogan, ``The Better Way to Buy a Car'' with the U.S. Patent and Trademark Office in 1996.

The government decided to let the dispute get settled in the trial before U.S. District Judge William Dimitrouleas.