Bacchus Marsh Concentrated Milk Co Ltd (in liq) v Joseph Nathan & Co Ltd

This case concerned a dispute between Joseph Nathan & Co Ltd (the vendor) and Bacchus Marsh Concentrated Milk Co Ltd (in liquidation) (the purchaser) arising from a contract for the sale of patent rights, inventions, and processes for manufacturing dried milk. The contract stipulated that the vendor would sell these rights to the purchaser, along with all related knowledge, and would not engage in the manufacture or sale of the dried milk products in Australia. In return, the purchaser agreed to grant the vendor a licence to import and sell a specific preparation, known by the trade name "Glaxo," in Australia, but only as an infant's food, for the remainder of the patent terms. The core of the dispute revolved around the parties' rights and obligations after the expiration of the patents.

The legal issues before the court were whether the contract, upon the expiration of the patents, prevented the vendor from manufacturing, importing, or selling the product known as "Glaxo" in Australia. Additionally, the court had to determine whether the purchaser had acquired the goodwill of the vendor's business in Australia and the right to use the trade mark "Glaxo." The vendor also sought rectification of the contract, arguing it did not accurately reflect the parties' true agreement regarding the post-patent period and the use of the "Glaxo" trade mark.

The Full High Court, by a majority decision, held that the contract did not, after the expiration of the patents, preclude the vendor from manufacturing, importing, or selling "Glaxo" in Australia. The court reasoned that the restrictive covenants in the contract were tied to the existence of the patents and the rights granted under them. Furthermore, the court found that the purchaser had no entitlement to the goodwill of the vendor's Australian business or the right to use the "Glaxo" trade mark. Higgins J. dissented, emphasizing that extrinsic evidence should not be used to interpret a contract unless ambiguity is demonstrated, and that rectification is only available where the written document fails to record the parties' actual agreement.

The decision of the Supreme Court of Victoria was varied. The majority found in favour of the vendor on the key issues concerning the post-patent rights and the trade mark, while also affirming that the purchaser had no claim to the goodwill of the vendor's business.