The power of the Court to direct amendment
11 The Court cannot direct an amendment under s 105 if the amendment is not allowable under s 102 of the Act: s 105(4) of the Act. Relevantly, s 102 provides:
Amendment of complete specification not allowable if amended specification claims or discloses matter extending beyond that disclosed in certain documents
(1) An amendment of a complete specification is not allowable if, as a result of the amendment, the specification would claim or disclose matter that extends beyond that disclosed in the following documents taken together:
(a) the complete specification as filed;
(b) other prescribed documents (if any).
Certain amendments of complete specification are not allowable after relevant time
(2) An amendment of a complete specification is not allowable after the relevant time if, as a result of the amendment:
(a) a claim of the specification would not in substance fall within the scope of the claims of the specification before amendment; or
(b) the specification would not comply with subsection 40(2) or (3).
Meaning of relevant time
(2A) For the purposes of subsection (2), relevant time means:
(a) in relation to an amendment proposed to a complete specification relating to a standard patent - after the specification has been accepted; or
(b) in relation to an amendment proposed to a complete specification relating to an innovation patent - after the Commissioner has made a decision under paragraph 101E(1)(a) in respect of the patent.
…
12 Importantly, however, s 102(3) provides, relevantly:
Section does not apply in certain cases
(3) This section does not apply to an amendment for the purposes of:
(a) correcting a clerical error or an obvious mistake made in, or in relation to, a complete specification; or
…
13 Here, the respondent says that the errors identified above in [10] are both "clerical errors" and "obvious mistakes" for the purpose of s 102(3)(a) of the Act.
14 In The Queen v Commissioner of Patents; Ex Parte Martin (1953) 89 CLR 381, Williams ACJ said (at 395):
… A clerical error, I would think, occurs where a person either of his own volition or under the instructions of another intends to write something and by inadvertence either omits to write it or writes something different. …
15 Fullagar J (with whom Kitto J and Taylor J agreed (at 408)) said (at 406), that the expression "clerical error" is of a "somewhat elastic character". After considering various dictionary meanings of the word "clerical", his Honour continued:
… Probably no one would deny that a clerical error may produce a significant, and even profound, effect as for example, in a case in which a writer or typist inadvertently omits the small word "not". But the characteristic of a clerical error is not that it is in itself trivial or unimportant, but that it arises in the mechanical process of writing or transcribing. …
16 In General Tire & Rubber Company (Frost's) Patent [1972] RPC 271, Graham J (at 279) considered an "obvious mistake" to be one which:
… involves that the instructed public can, from an examination of the specification, appreciate the existence of the mistake and the proper answer by way of correction.
17 In reaching that conclusion, his Lordship distinguished between such a mistake and a mistake that had been "obviously made". His Lordship (at 278) explained the distinction as follows:
It is the mistake which must be obvious and not the fact that it has been made. This implies, to my mind, that both the fact of mistake and the correction necessary must be clear to the reader's mind, and it is not enough if he merely appreciates the presence of a mistake. If, in a mathematical context, it is said "2 and 2 make 5", the reader would immediately say: "5 is an obvious mistake for 4". If, however, there is more than one possible correct answer to the question, particularly where the answers may depend on intention or judgment, the reader would say: "Obviously a mistake has been made but I cannot tell you what is the right answer". The wording of the section itself therefore, to my mind, shows an intention in favour of the first construction rather than the second.
18 In the course of considering that question, his Lordship observed (at 277) that, for the purpose of correcting an obvious mistake:
… it does not matter that the claim may be enlarged by the amendment.
19 Both these cases accept that the correction of clerical errors and obvious mistakes may involve the making of very significant amendments to the specification and, in particular, the claims. Yet, such amendments are allowable if they are truly "clerical errors" or "obvious mistakes".
20 In DSI Australia (Holdings) Pty Ltd v Garford Pty Ltd [2011] FCA 1411, when delivering ex tempore reasons, I drew attention to what I perceived to be a possible tension between s 105(4) and s 102(3) of the Act, saying (at [14]):
14 As noted above, s 102(3) provides that s 102 does not apply to an amendment for the purpose of correcting a clerical error or an obvious mistake made in or in relation to a complete specification. I am inclined to the view that the reference in claim 6 to claim 4 is at least an obvious mistake. However, s 105(4) provides that a court is not to direct an amendment that is not allowable under s 102. That provision raises what might be a tension with s 102(3) of the Act. It is not necessary for me to resolve that question, because I am satisfied that the amendment which is now proposed would not fall foul of either s 102(1) or s 102(2) of the Act.
21 On further consideration, I am satisfied that there is no such tension. Section 105(4) is an injunction against making any amendment that is "not allowable". Section 102 specifies the criteria against which an amendment is "not allowable". Section 102(3) exempts from the purview of s 102 clerical errors and obvious mistakes. Thus, if the Court is satisfied that the amendment sought is for the purpose of correcting a clerical error or an obvious mistake made in, or in relation to, a complete specification, it is not necessary to consider the criteria in s 102 by which an amendment is to be adjudged as "not allowable". This is the basis on which I proceeded in Vringo Infrastructure, Inc v ZTE (Australia) Pty Ltd [2013] FCA 1152, without further discussion on the point.