In Koop v. Bebb [2] an action was brought in the Supreme Court of Victoria by two infant plaintiffs, who alleged that the death of their father had been caused by the negligent driving of a motor car by the defendant. The accident in which the father had suffered fatal injuries had occurred in New South Wales, but his death took place in Victoria. The case was decided on the basis that the same act - the negligent driving causing death - was actionable in New South Wales by virtue of a New South Wales statute corresponding to the English Fatal Accidents Act 1846, and would, if it had been committed in Victoria, have been actionable in Victoria by virtue of a Victorian statute in similar terms. Because s. 65 of the English Patents Act 1949 gives (in terms similar to, though by no means identical with, those of our s. 121) a right of action for unjustified threats to sue for infringement of a patent, it might be suggested that the position in the present case is analogous to that which subsisted in Koop v. Bebb [1] . But, by reason of what Wolff, Private International Law (1950) 2nd ed., p. 487 calls "the strict territoriality of patents", there is, in my opinion, no analogy. No action could be maintained in England for an infringement of an Australian patent, or in Australia for an infringement of an English patent: Wolff, op. cit., pp. 486, 487; Potter v. Broken Hill Proprietary Co. Ltd. [2] . It is true that this is referred to in Dicey, Conflict of Laws, 7th ed., (1958) p. 951, as "an open question". Hancock, Torts in the Conflict of Laws (1942) pp. 89, 90, seems to prefer the dissenting view of a'Beckett J. that it is enough if the "foreign" law would afford redress "for a wrong of the same character" as that which is the subject matter of the action. But this is not, I think, the sense in which the rule laid down in Phillips v. Eyre [3] has generally been understood, and it could lead to great uncertainties. Suppose that slander is actionable in the country of the forum but only libel in the locus delicti commissi. If the question were an open question for me, I should decide it as it has been decided, though I would not regard a patent as an "immovable": see In re Usines de Melle's Patent [4] . But it is not, I think, an open question for me.