"In my opinion, the words ['person aggrieved'] were intended by the Act to cover all trade rivals over whom an advantage was gained by a trader who was getting the benefit of a registered trade mark to which he was not entitled. At common law a trader could ask the courts to protect him from the improper use of his mark by others who would pass off their goods as his. But to do this he had to establish by cogent evidence from the purchasing public and the trade that the mark had come to denote his goods and his alone. To avoid the paraphernalia of proof and to help traders by enabling them to see more clearly where they stood in respect of particular marks the Trade Marks Acts were passed. It is, and was intended to be, a great advantage to a trader to have his mark registered under the Acts. That advantage to him is to some extent a corresponding disadvantage to his rivals. He was only intended to have it if the necessary qualifications are fulfilled. If they are not, the mark is not to be entered on the register. If it subsequently appears that it is wrongly on the register, it is to be removed. For to permit it to remain would give him, at the expense of his rivals, an advantage to which he is not entitled. Thus, the general intention and policy of the Act show, I think, that Parliament intended the words to have a wide meaning. If an erroneous entry gives to his rival a statutory trade advantage which he was not intended to have, any trader whose business is, or will probably be, affected thereby is 'aggrieved' and entitled to ask that the error should be corrected."