23. The remedy of injunction, now provided by statute to prevent the infrinement of a registered trade mark, reflects the history of the way in which equity protected and established a property in trade marks before they were recognized by statute. And the account of profits retains the characteristics of its origin in the Court of Chancery. By it a defendant is made to account for, and is then stripped of, profits he has made which it would be unconscionable that he retain. These are profits made by him dishonestly, that is by his knowingly infringing the rights of the proprietor of the trade mark. This explains why the liability to account is still not necessarily coextensive with acts of infringement. The account is limited to the profits made by the defendant during the period when he knew of the plaintiff's rights. So it was in respect of common law trade marks. So it still is in respect of registered trade marks : Edelsten v. Edelsten (1863) 1 De G J & S 185 (46 ER 72) ; Slazenger & Sons v. Spalding & Bros. (1910) 1 Ch 257 ; Moet v. Couston [1864] EngR 424; (1964) 33 Beav 578 (55 ER 493) . I think that it follows that it lies upon a plaintiff who seeks an account of profits to establish that profits were made by the defendant knowing that he was transgressing the plaintiff's rights. Counsel for the plaintiff disputed this. He contended that once infringement was admitted the onus was on the defendant to prove its allegation that for the period up to September 1965 it was ignorant of the plaintiff's rights in the mark. This, he said, was put forward as a matter of defence. I note, however, that in Moet v. Couston, Romilly M.R. - after quoting Edelsten v. Edelsten, for the proposition that a plaintiff was not entitled to an account of profits from a defendant who used a mark not knowing of the plaintiff's right - said (1864) 33 Beav, at p 581 (55 ER, at p 494) : "On looking at the evidence in this case, I find that the plaintiffs fail in establishing any such knowledge on the part of the defendants." In the present case I would say the same thing. But the question of where the onus lies does not really arise. As I have said, I find positively that the defendant did not know of the registration of the name Craftmaster as a trade mark until at the earliest 30th August 1965 when it learnt of the letter received by one of its retailer customers. It is suggested that one answer by Mr. Winstock as recorded in the transcript of evidence contradicts this. But, having heard some discussion of this by counsel, I am satisfied that the form in which this appears in the transcript is a garbled version of what the witness said when speaking of correspondence which he had after he had had advice from his patent attorney. (at p35)