Willmann v Petersen

In *Willmann v Petersen*, the High Court of Australia considered a dispute concerning patent infringement. The applicant, Willmann, alleged that the respondent, Petersen, had infringed upon his patent rights. The case came before the High Court, presided over by Griffith CJ, Barton and O'Connor JJ.

The central legal issues before the Court were whether the patent claimed by Willmann was valid, specifically concerning the subject matter of the patent, and whether Petersen's actions constituted an infringement of that patent. The Court was required to determine if the patent was for a new invention or merely an application of old contrivances to a new use, and whether the alleged infringing device was a valid combination.

The Court's reasoning focused on the principles of patent law relating to novelty and inventive step. It examined whether the patentee had indeed invented something new and not simply discovered a new use for an existing device or process. The Court applied established legal principles to assess the validity of the patent and the alleged infringement, considering the scope of the patent claims and the nature of the respondent's activities.

The Court ultimately found in favour of the respondent, Petersen, and ordered that the appeal be dismissed. The Court also ordered that the appellant, Willmann, pay the costs of the appeal.