Appellant, a New York corporation which is engaged in Georgia in licensing copyrighted motion pictures, brought suit to restrain a Georgia tax upon the gross receipts of royalties. Appellant urged the invalidity of the tax upon the ground that copyrights are instrumentalities of the United States. The supreme court of Georgia ruled that the suit should be dismissed. On appeal to the Supreme Court of the United States it was held, in Fox Film Corporation v. Doyal, that a state tax on royalties derived from copyrights is valid.