Aristocrat Technologies Australia Pty Ltd v Commissioner of Patents

Aristocrat Technologies Australia Pty Ltd appealed to the High Court of Australia against a decision of the delegate of the Commissioner of Patents. The dispute concerned four innovation patents held by Aristocrat for various embodiments of electronic gaming machines (EGMs). The patents claimed inventions comprising a combination of a player interface (the physical features of the EGM) and a game controller (the computerised components that implement the game). The delegate had revoked these patents on the grounds that the claimed inventions did not constitute a "manner of manufacture" as required by section 18(1A)(a) of the *Patents Act 1990* (Cth).

The central legal issue before the High Court was whether the claimed inventions, as formulated in the patent specifications, constituted a "manner of manufacture" within the meaning of the *Patents Act*. This required the Court to consider whether the combination of a player interface and a game controller, where both components and their interaction were part of common general knowledge in the field of EGM construction, could be considered a patentable invention. The Court had to determine the proper characterisation of the claimed inventions and whether they fell within the scope of what is considered a "proper subject of letters patent" under Australian patent law.

The High Court reasoned that the claimed inventions, when properly characterised, did not represent an improvement in computer technology or an artificially created state of affairs that produced a useful result. Instead, the Court found that the claims essentially described a mere scheme or plan for operating an EGM, relying on existing, common general knowledge regarding the components and functionality of such machines. The Court applied established principles for determining whether a computer-implemented invention constitutes a "manner of manufacture," emphasising that claims must go beyond abstract ideas or generic computer technology to demonstrate a patentable invention. The Court noted that the claimed combination of player interface and game controller, as described, did not add anything novel or inventive to the existing state of knowledge in the field.

The appeal was dismissed, and Aristocrat was ordered to pay the costs of the Commissioner of Patents.