In a unanimous decision – Commissioner of Patents v Aristocrat Technologies Australia Pty Ltd [2021] FCAFC 202 – a Full Bench of three judges (Middleton, Perram and Nicholas JJ) of the Federal Court of Australia (‘Full Court’) has reversed last year’s ruling by Justice Burley that claims directed to a so-called ‘feature game’ implemented on an electronic gaming machine (EGM) constituted a patent-eligible ‘manner of manufacture’ under Australia law.  (A ‘feature game’ is a secondary, or bonus, game triggered by the occurrence of a defined event in the ‘base’ game of spinning reels.)  As I explained at the time, Justice Burley applied a two step test, asking firstly whether ‘the claimed invention is for a mere scheme or business method of the type that is not the proper subject matter of a grant of letters patent’ and then – if this question is answered in the affirmative – ‘whether the computer-implemented method is one where invention lay in the computerisation of the method’ as opposed to ‘merely plugging an unpatentable scheme into a computer’.  He found the claims to be patentable at the first step, because they were directed to ‘a mechanism of a particular construction’, i.e. a gaming machine.

The Full Court has rejected Justice Burley’s test, with the majority (Middleton and Perram JJ) proposing an alternative two step test (at [26]) which asks firstly whether the claimed invention is ‘a computer-implemented invention’ and then – if so – ‘can the invention claimed broadly be described as an advance in computer technology’.  The majority determined that Aristocrat’s EGM, despite being claimed in terms of a combination of hardware and software components, was in substance a computer-implemented invention, and that the asserted contribution of the claimed invention ‘pertains only to the use of a computer’ and not to ‘the development or advance of computer technology’ (at [63]-[64]).  As such, they concluded that the claims were not directed to patent-eligible subject matter.

The third judge of the Full Court, Nicholas J, arrived at the same ultimate conclusion, by different reasoning.  He agreed with the majority that Justice Burley’s two step test was not the correct approach, because it failed to ‘engage with the Commissioner’s submission that the invention as described and claimed was in substance a mere scheme or set of rules for playing a game implemented using generic computer technology for its well-known and well-understood functions’ (at [135]).  However, rather than embarking upon an inquiry as to whether Aristocrat’s claims were directed to a ‘computer-implemented invention’ he simply observed that ‘the substance of the invention, as described and claimed, resides in the game program code which embodies a computer implemented scheme or set of rules for the playing of a game’ (at [138]).  He further reasoned (at [140]-[142]) that the game code does not solve any ‘technological problem’, nor does it exhibit any ‘unusual technical effect due to the way in which the computer is utilised’, and therefore that there is nothing ‘about the way in which the game code causes the EGM to operate which can be regarded as having transformed what might otherwise be regarded as purely abstract information encoded in memory into something possessing the required artificial effect.’

While the Full Court found the representative claim at issue to be unpatentable, it did not entirely foreclose the possibility that there may be patent-eligible aspects to the inventions disclosed in Aristocrat’s four innovation patents.  The case has been remitted back to Justice Burley to determine any residual issues in light of the Full Court’s judgment.

There are positive and negative aspects to this decision.  On the plus side, the approach taken by the majority brings some clarity to the approach to be taken in construing and assessing claims to computer-implemented inventions, which often comprise a physical apparatus defined in terms of (possibly conventional) hardware, configured via software for particular functionality.  On the down side, however, the majority also relied upon the existence of ‘an advance in computer technology’ to confer patent-eligibility upon a computer-implemented invention, without providing clear guidance on what, exactly, is covered by this terminology.  The decision also perpetuates an uncertainty that exists around the exact role to be played by prior art information in applying the ‘manner of manufacture’ test to assess patent-eligibility.