“In my judgement it is clear from this passage that “authorise” means the grantor purported grant of the right to do the act complained of. It does not extend tomere enablement, assistance or even encouragement. The grant or purported grant to do the relevant act may be express or implied from all the relevant circumstances. In a case which involves an allegation of authorisation by supply, these circumstances may include the nature of the relationship between the alleged authoriser and the primary infringer, whether the equipment or other material supplied constitutes the means used to infringe, whether it is inevitable it will be used to infringe, the degree of control which the supplier retains and whether he has taken any steps to prevent infringement. These are matters to be taken into account and may or may not be determinative depending upon all the other circumstances.”
“I must first deal with the relevant legal principles. By contrast with jointliability as tortfeasors for damages, including damages calculated on a royaltybasis, an account of profits operates against each defendant separately, requiringhim or it to disgorge such profits as are shown to have been derived by thatdefendant from the relevant infringements. In that respect, there is no difference between trademark infringement and passing off, even though the basis of liability for one is statutory and, for the other, based on the common law… The measure of liability is the profit derived by the defendant from the infringement.”
“This Court is not a Court of penal jurisdiction. It compels restitution of property unconscientiously withheld; it gives full compensation for any loss or damage through failure of some equitable duty; but it has no power of punishing any one. In fact, it is not by way of punishment that the Court ever charges a trustee with more than he actually received, or ought to have received, and the appropriate interest thereon. It is simply on the ground that the Court finds that he actually made more, constituting moneys in his hands “had and received to the use” of the cestui que trust.”
“99. I prefer the view of Lewison J. The difference between losses suffered and profits made is that wrongdoers responsible for losses should prima facie be made to pay for them since the innocent party has suffered the losses and they have caused them. But the disgorgement of profits made which are not the counterpart of losses suffered requires the existence of some equity to require it. If a fiduciary acquires a profit as a result of his breach of fiduciary duty equity will regard the profit thus derived as due to the person to whom the duty was owed, for which the fiduciary must account. The same applies to a profit derived by the dishonest assister from his assistance in a breach of fiduciary duty. But there is no equity to compel someone who has not made a profit fromhis breach, or dishonest assistance in that of another, to account for a profitwhich he has not made and which does not represent a loss which the principalhas suffered.”