It is a general principle of patent law that publication of a patent specification and claims serves to put the public on-notice of the existence and scope of the patentee’s rights. In an effort to ensure that this is the case, the Australian Patents Act 1990 requires that ‘the claim or claims must be clear and succinct and supported by matter disclosed in the specification’ (subsection 40(3)), while the analogous US provision, 35 USC § 112(b) states that ‘the specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the inventor or a joint inventor regards as the invention.’ In Australia we usually refer this as the ‘clarity’ requirement, while the US courts have developed a corresponding doctrine of ‘indefiniteness’. In its 2014 decision Nautilus, Inc. v Biosig Instruments, Inc, the US Supreme Court interpreted this to mean that ‘a patent is invalid for indefiniteness if its claims … fail to inform, with reasonable certainty, those skilled in the art about the scope of the invention’. Other jurisdictions have similar requirements.
This is all very well, but what happens if the claims change? It is not uncommon for a patentee to seek amendment of its patent specification, for example in preparation for, or in the course of, litigation. Granted patent claims can only be amended in ways that do not broaden the scope of a patent, i.e. no valid amendment can result in any act becoming an infringement that would not have been an infringement prior to the amendment, so this does not provide a mechanism for a patentee to ‘capture’ a previously non-infringing activity. However, a claim could, in principle, be narrowed by replacing unclear, vague, or ambiguous wording with clearer and more definite wording that specifically targets the actions of a competitor.
In such a case, the patentee would no doubt argue that it was simply ‘tightening up’ the language of its claims to limit the issues to be addressed during infringement proceedings, and perhaps as a pre-emptive defence against a cross-claim for invalidity. The accused infringer, on the other hand, might argue that it was not properly on-notice of scope of the patent prior to the amendment, as a result of the ambiguity in the wording of the claims.
Fortunately, the Australian legislation anticipates this situation. Subsection 115(1) provides that:
In layperson’s terms, if the job was not done honestly and properly in the first place, then the patentee should not expect to be able to obtain any compensation for alleged infringement that occurred prior to the amendment.
But what constitutes ‘reasonable skill and knowledge’? Does your patent attorney (or, if you are a patent attorney, do you) possess these attributes? And what responsibility does a patent applicant, in instructing a patent attorney, bear in ensuring that reasonable skill and knowledge are employed? These issues were recently considered by Justice Jagot in the Federal Court decision Bayer Pharma Aktiengesellschaft v Generic Health Pty Ltd [2017] FCA 250, who confirmed that ‘the words “reasonable skill and knowledge” require the specification as framed to be in the form in which a person, with reasonable skill in drafting patent specifications and a knowledge of the relevant law and practice, would produce given the patentee's knowledge of the invention.’ The judgment also provides some interesting guidelines as to what, exactly, might be expected of a patent attorney in order to meet this standard.
The question was not merely academic, with over $25 million in damages at stake. And it may not yet be finally settled, with various aspects of the case now in appeal to a Full Bench of the Federal Court of Australia.
This is all very well, but what happens if the claims change? It is not uncommon for a patentee to seek amendment of its patent specification, for example in preparation for, or in the course of, litigation. Granted patent claims can only be amended in ways that do not broaden the scope of a patent, i.e. no valid amendment can result in any act becoming an infringement that would not have been an infringement prior to the amendment, so this does not provide a mechanism for a patentee to ‘capture’ a previously non-infringing activity. However, a claim could, in principle, be narrowed by replacing unclear, vague, or ambiguous wording with clearer and more definite wording that specifically targets the actions of a competitor.
In such a case, the patentee would no doubt argue that it was simply ‘tightening up’ the language of its claims to limit the issues to be addressed during infringement proceedings, and perhaps as a pre-emptive defence against a cross-claim for invalidity. The accused infringer, on the other hand, might argue that it was not properly on-notice of scope of the patent prior to the amendment, as a result of the ambiguity in the wording of the claims.
Fortunately, the Australian legislation anticipates this situation. Subsection 115(1) provides that:
Where a complete specification is amended after becoming open to public inspection, damages shall not be awarded, and an order shall not be made for an account of profits, in respect of any infringement of the patent before the date of the decision or order allowing or directing the amendment:
(a) unless the court is satisfied that the specification without the amendment was framed in good faith and with reasonable skill and knowledge…
In layperson’s terms, if the job was not done honestly and properly in the first place, then the patentee should not expect to be able to obtain any compensation for alleged infringement that occurred prior to the amendment.
But what constitutes ‘reasonable skill and knowledge’? Does your patent attorney (or, if you are a patent attorney, do you) possess these attributes? And what responsibility does a patent applicant, in instructing a patent attorney, bear in ensuring that reasonable skill and knowledge are employed? These issues were recently considered by Justice Jagot in the Federal Court decision Bayer Pharma Aktiengesellschaft v Generic Health Pty Ltd [2017] FCA 250, who confirmed that ‘the words “reasonable skill and knowledge” require the specification as framed to be in the form in which a person, with reasonable skill in drafting patent specifications and a knowledge of the relevant law and practice, would produce given the patentee's knowledge of the invention.’ The judgment also provides some interesting guidelines as to what, exactly, might be expected of a patent attorney in order to meet this standard.
The question was not merely academic, with over $25 million in damages at stake. And it may not yet be finally settled, with various aspects of the case now in appeal to a Full Bench of the Federal Court of Australia.