It was in this sense that the House of Lords defined "person aggrieved" in the matter of Powell's Trade Mark: "...although they were no doubt inserted to prevent officious interference by those who had no interest at all in the register being correct,and to exclude a mere common informer,it is undoubtedly of public interest that they should not be unduly limited,inasmuch as it is a public mischief that there should remain upon the register a mark which ought not to be there,and by which many persons may be affected,who,nevertheless,would not be willing to enter upon the risk and expense of litigation