Pfizer Ireland Pharmaceuticals v Samsung Bioepis AU Pty Ltd

In Pfizer Ireland Pharmaceuticals v Samsung Bioepis AU Pty Ltd, the appellant sought preliminary discovery against the respondent, who was not a party to the proceedings at the time. The nature of the dispute involved the interpretation and application of sections 34 and 35 of the Patents Act 1990 (Cth) regarding the disclosure of documents pertinent to the validity of a patent. The Federal Court of Australia was the judicial body that heard and decided the matter.

The central legal issues that the court needed to address were whether the appellant had a reasonable belief that it might have a right to obtain relief under sections 34 and 35 of the Patents Act, and if the opinion rule under section 76 of the Evidence Act 1995 (Cth) barred the admissibility of opinion evidence in a preliminary discovery application. The court had to balance the need for discovery against the protection of confidential information, while also determining the admissibility of expert opinion evidence.

The court found that the appellant had indeed held a reasonable belief that it might be entitled to relief, given the circumstances and the information available. The court also held that the opinion rule under section 76 of the Evidence Act did not preclude the admissibility of expert opinion evidence in preliminary discovery applications. The court emphasised the importance of ensuring that the discovery process does not infringe upon confidential information, and that expert opinions could be considered if necessary to establish the existence of a reasonable belief. Consequently, the court allowed the appeal and set aside the orders made by the primary judge, directing that the respondent provide the appellant with preliminary discovery under specified terms.

The final orders of the court granted leave to the prospective applicants to appeal, allowed the appeal, and set aside the primary judge's orders. The court further ordered that the matter be remitted to the primary judge to determine the final form of the preliminary discovery orders, including any necessary confidentiality measures, and to address the issue of costs. The respondent to the appeal was also directed to pay the appellant's costs as assessed or agreed upon.