“I do not myself see how it is any answer to a man who comes forward to establish such a common law Trade Mark to say that, some time after your character was established and your goods were known, and you money, time, and ingenuity had been expended, perhaps in large advertisements and otherwise, others began to use it, and so, because they began to use it after your rights had been ascertained, it is in common use. That seems to me to be an argument which contradicts itself in the mere statement. When once appropriation has been made, common use becomes impossible; until (and possibly that is the logical result of this case) the person entitled to the Trade Mark allows others to use it so as to forfeit his right to appropriate the term, and so the words sink again into common use, from which, of course, after that, they cannot be revived. But until something of that kind has happened, it seems to me that words once https://hcservices.ecourts.gov.in/hcservices/ appropriated cannot be said to be words in common use, merely because others, who ex concessis on the mere statement, are