McDonald v Commissioner of Patents

The High Court of Australia heard an appeal from the Commissioner of Patents concerning the refusal to accept an application and specification for an "improved attachment for wheels of self-propelled vehicles." The applicants, Murdoch McDonald and George Walter Hall, sought a patent for a device designed to prevent vehicle wheels from skidding or racing on loose or slippery ground, which involved passing separate chains transversely around the tire and rim. The Commissioner had refused acceptance on grounds including that the specification described a mere working direction, lacked novelty due to a prior patent for a chain-mail-like covering, and that the invention in the third claim was not outlined in the provisional specification.

The central legal issue before the High Court was whether the Commissioner was justified in refusing to accept the patent application and specification at this preliminary stage. Specifically, the Court had to determine if the Commissioner's grounds for refusal, particularly concerning the lack of novelty and the nature of the invention as a mere working direction, were sufficiently clear and obvious to warrant a complete bar to the patent application, or if the matter should proceed to a stage where objections could be more fully investigated.

The Court reasoned that the Commissioner should only refuse to accept a patent application and specification in clear and obvious cases where a patent cannot be granted. Applying this principle, the Court found that while the use of chains on tires might be known, the specific arrangement of separate chains as described by the applicants could potentially offer greater efficiency, economy, or convenience, thus involving a substantial exercise of the inventive faculty. The Court considered that the evidence presented did not make it obvious that the invention lacked novelty or was not a proper subject for a patent, and that the applicants should have the opportunity to present further evidence.

Consequently, the High Court allowed the appeal, ordering that the application and specification be accepted. The Court also confirmed that costs were within its discretion and, in this instance, did not award costs against the Commissioner.