MR. CHIEF JUSTICE WARREN delivered the opinion of the Court.
This is an action to recover treble damages for alleged violation of the federal antitrust laws. The only question presented is whether the action is barred, in the circumstances of the case, under the doctrine of res judicata.
Petitioners are engaged in the business of leasing advertising posters to motion picture exhibitors in the Philadelphia area. Such posters, known in the trade as standard...
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