The Relevant Principles (Interlocutory Injunctions)
18 In Samsung Electronics Co Ltd v Apple Inc (2011) 286 ALR 257 at 271-279 [44]-[74], the Full Court explained the source of the power of this Court to grant injunctive relief in patent cases and the principles upon which it would consider doing so on an interlocutory basis. A particular feature of that case was the fact that the grant or refusal of interlocutory relief would have had the practical effect of putting an end to the proceeding. That feature is also present in the instant case. The High Court refused special leave in Apple Inc v Samsung Electronics Co Ltd [2011] HCATrans 341, stating that it saw insufficient prospects of success on the part of Apple demonstrating error on the part of the Full Court. The High Court also remarked that the Full Court's detailed consideration of Apple's case weighed against the grant of special leave.
19 I shall endeavour to extract the important points of principle from the passages in Samsung Electronics Co Ltd v Apple Inc to which I have referred at [18] above. In doing so, I do not intend to alter or dilute in any way the judgment of the Full Court. Rather, I intend to apply it. The matters which I particularly wish to emphasise are:
(a) Where the source of the Court's power to grant an injunction is a specific provision in a statute (as is the case here), the term "injunction" takes its context from the provisions of the particular statute in question (at 271-272 [46]-[47);
(b) Section 122 of the Patents Act empowers the Court to restrain an infringement of an Australian registered patent subject to such terms, if any, as the Court thinks fit (at 272 [48]);
(c) Where the merits and the question of convenience are fairly evenly balanced, there will be no injustice in requiring the party seeking relief to demonstrate good prospects of success before imposing almost certain prejudice on the other side (at 272-273 [49]-[51] esp at [51]);
(d) Where an interlocutory injunction is sought in respect of private rights, it is necessary to identify the legal or equitable rights which are to be determined at the trial and in respect of which final relief is sought (at 272 [52]);
(e) As Mason ACJ said in Castlemaine Tooheys Ltd v South Australia (1986) 161 CLR 148 at 153:
… In order to secure such an injunction the plaintiff must show (1) that there is a serious question to be tried or that the plaintiff has made out a prima facie case, in the sense that if the evidence remains as it is there is a probability that at the trial of the action the plaintiff will be held entitled to relief; (2) that he will suffer irreparable injury for which damages will not be an adequate compensation unless an injunction is granted; and (3) that the balance of convenience favours the granting of an injunction.
(f) The Court's task of assessing the balance of convenience and justice requires the Court to determine whether the inconvenience or injury which the plaintiff would be likely to suffer if an injunction were refused outweighs or is outweighed by the injury which the defendant would suffer if an injunction were granted (at 273-274 [55] and the passages cited therein from Beecham Group Ltd v Bristol Laboratories Pty Ltd (1968) 118 CLR 618 (Beecham)).
(g) The question of whether or not the plaintiff must show that he will suffer irreparable harm if no injunction is granted is one of the matters which will ordinarily need to be addressed in the Court's consideration of the balance of convenience and justice (at 276 [61]).
20 At 276-279 [62]-[74], the Full Court discussed the balance of convenience and justice and the relationship between the basket of considerations relevant to the Court's assessment of that matter and the need for a plaintiff to establish a prima facie case or serious question to be tried. The observations of the Full Court in those passages are of particular relevance to the present case. The Court said:
62 The assessment of harm to the plaintiff, if there is no injunction, and the assessment of prejudice or harm to the defendant, if an injunction is granted, is at the heart of the basket of discretionary considerations which must be addressed and weighed as part of the court's consideration of the balance of convenience and justice. The question of whether damages will be an adequate remedy for the alleged infringement of the plaintiff's rights will always need to be considered when the court has an application for interlocutory injunctive relief before it. It may or may not be determinative in any given case. That question involves an assessment by the court as to whether the plaintiff would, in all material respects, be in as good a position if he were confined to his damages remedy, as he would be in if an injunction were granted: see the discussion of this aspect in I C F Spry, The Principles of Equitable Remedies, 8th ed, Lawbook Co, New South Wales, 2010, pp 383-9; pp 397-9; and pp 457-62.
63 The interaction between the court's assessment of the likely harm to the plaintiff, if no injunction is granted, and its assessment of the adequacy of damages as a remedy, will always be an important factor in the court's determination of where the balance of convenience and justice lies. To elevate these matters into a separate and antecedent inquiry as part of a requirement in every case that the plaintiff establish "irreparable injury" is, in our judgment, to adopt too rigid an approach. These matters are best left to be considered as part of the court's assessment of the balance of convenience and justice even though they will inevitably fall to be considered in most cases and will almost always be important considerations to be taken into account.
64 Gleeson CJ also observed in Lenah Game Meats (at [18]), that, where there is little or no room for argument about the legal basis of the applicant's claimed private right, the court will be more easily persuaded at an interlocutory stage that a prima facie case has been established. The court will then move on to consider discretionary considerations, including the balance of convenience and justice. But, as his Honour also observed at [18]:
18 The extent to which it is necessary, or appropriate, to examine the legal merits of a plaintiff's claim for final relief, in determining whether to grant an interlocutory injunction, will depend upon the circumstances of the case. There is no inflexible rule.
65 The resolution of the question of where the balance of convenience and justice lies requires the court to exercise a discretion.
66 In exercising that discretion, the court is required to assess and compare the prejudice and hardship likely to be suffered by the defendant, third persons and the public generally if an injunction is granted, with that which is likely to be suffered by the plaintiff if no injunction is granted. In determining this question, the court must make an assessment of the likelihood that the final relief (if granted) will adequately compensate the plaintiff for the continuing breaches which will have occurred between the date of the interlocutory hearing and the date when final relief might be expected to be granted.
67 As Sundberg J observed in Sigma Pharmaceuticals (Aust) Pty Ltd v Wyeth (2009) 81 IPR 339; [2009] FCA 595 at [15] (Sigma Pharmaceuticals), when considering whether to grant an interlocutory injunction, the issue of whether the plaintiff has made out a prima facie case and whether the balance of convenience and justice favours the grant of an injunction are related inquiries. The question of whether there is a serious question or a prima facie case should not be considered in isolation from the balance of convenience. The apparent strength of the parties' substantive cases will often be an important consideration to be weighed in the balance: Tidy Tea Ltd v Unilever Australia Ltd (1995) 32 IPR 405 (Tidy Tea) at [416] per Burchett J; Aktiebolaget Hassle v Biochemie Australia Pty Ltd (2003) 57 IPR 1; [2003] FCA 496 at [31] per Sackville J; Hexal Australia Pty Ltd v Roche Therapeutics Inc (2005) 66 IPR 325; [2005] FCA 1218 at [18] per Stone J; and Castlemaine Tooheys at CLR 154; ALR 558 per Mason ACJ.
68 It may also be necessary to consider and evaluate the impact that the grant or refusal of an injunction will have or is likely to have on third persons and the public generally.
69 In Patrick at [65] and [66], Brennan CJ and McHugh, Gummow, Kirby and Hayne JJ, in a joint judgment, expressly adopted a passage from Spry, 1997, pp 402-3, which may be summarised as follows:
(a) in assessing the balance of convenience in an interlocutory injunction application, the interests of the public and third persons are relevant and have more or less weight according to other material circumstances;
(b) whether those interests tend to favour the grant or the refusal of an injunction in any given case depends upon the circumstances of that case; and
(c) hardship visited upon third persons or the public generally by the grant of an interlocutory injunction will rarely be decisive.
70 In order to address the balance of convenience and justice in the present case, it is necessary to consider the nature and strength of Apple's case and the circumstances in which Samsung decided to compete with Apple by importing the Galaxy Tab 10.1 into Australia and by promoting and selling that device in this country.
71 Furthermore, there are some kinds of case where, for the purpose of assessing where the balance of convenience and justice lies, it is desirable that the court:
… evaluate the strength of the plaintiff's case for final relief
Per McLelland J in Kolback Securities Ltd v Epoch Mining NL (1987) 8 NSWLR 533 at 536A-D (Kolback Securities).
72 Lord Diplock considered the point in NWL Ltd v Woods [1979] 3 All ER 614 at 625, and emphasised that the rule concerning a serious issue to be tried propounded in American Cyanamid was not developed in the context of a case where the grant of a interlocutory injunction would, in effect, finally determine the matter at hand in favour of whichever party was successful in the application because there would be nothing left on which it was in the unsuccessful party's interest to proceed to trial.
73 Diplock LJ continued (at 626):
Where … the grant or refusal of the interlocutory injunction will have the practical effect of putting an end to the action because the harm that will have been already caused to the losing party by its grant or its refusal is complete and of a kind for which money cannot constitute any worthwhile recompense, the degree of likelihood that the plaintiff would have succeeded in establishing his right to an injunction if the action had gone to trial is a factor to be brought into the balance by the judge in weighing the risks that injustice may result from his deciding the application one way rather than the other.
74 In Kolback Securities, McLelland J said (at 536):
… although normally the Court "does not undertake a preliminary trial, and give or withhold interlocutory relief upon a forecast as to the ultimate result of the case" (Beecham Group Ltd v Bristol Laboratories Pty Ltd (1968) 118 CLR 618 at 622; [1968] ALR 469 at 470), there are some kinds of case in which for the purpose of seeing where lies the balance of convenience (or more specifically "the balance of the risk of doing an injustice" - see per May LJ in Cayne v Global Natural Resources plc [1984] 1 All ER 225 at 237, cf per Brennan J in Brayson Motors Pty Ltd v FCT (1983) 46 ALR 279 at 285; 57 ALJR 288 at 292), it is desirable for the Court to evaluate the strength of the plaintiff's case for final relief: see eg, Brayson Motors Pty Ltd v FCT (at ALR 285; ALJR 292); Castlemaine-Tooheys Ltd v South Australia at 682; 559. One class of case to which this applies is where the decision to grant or refuse an interlocutory injunction will in a practical sense determine the substance of the matter in issue …
See also: O'Neill at [72] per Gummow and Hayne JJ; Australian Competition and Consumer Commission v Allphones Retail Pty Ltd (No 2) (2009) 253 ALR 324; [2009] FCA 17 at [27]-[31] per Foster J; Yara Australia Pty Ltd v Burrup Holdings Ltd (2010) 80 ACSR 641; [2010] FCA 1273 at [79]-[85] per Barker J.