Agro-K Corporation v Ag Direct Sales Pty Ltd & Sumitomo Australia Ltd

Agro-K Corporation (Agro-K) brought proceedings against Ag Direct Sales Pty Ltd (Ag Direct) and Sumitomo Australia Ltd (Sumitomo) in the Federal Court of Australia. The dispute concerned Agro-K's claim that Ag Direct and Sumitomo had infringed its Australian Patent No 2005203176 (the patent) for a plant nutrient composition. Agro-K alleged that Ag Direct, a distributor of agricultural products, had sold products that embodied the patented invention, and that Sumitomo, a supplier to Ag Direct, had induced or procured the infringement.

The primary legal issues before the court were whether the patent was valid and, if so, whether Ag Direct had infringed the patent. If infringement was established, the court also had to consider whether Sumitomo had induced or procured that infringement. The validity of the patent was challenged on grounds of lack of novelty and lack of inventive step, with the defendants arguing that the claimed invention was not new and would have been obvious to a person skilled in the art at the time of filing.

Justice Ryan found that the patent was valid, rejecting the defendants' arguments regarding lack of novelty and inventive step. Her Honour concluded that the claimed invention represented a genuine advance in the field of plant nutrition and was not obvious. Consequently, the court found that Ag Direct had infringed the patent. Regarding Sumitomo, Justice Ryan determined that Sumitomo had induced or procured the infringement by Ag Direct, finding that Sumitomo had knowledge of the patent and intended for Ag Direct to sell products that infringed it.