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T 1090/12 - Common general knowledge referred to by a board


Under what circumstances does common general knowledge require proof? And who has to provide proof: applicants/proprietors, opponents, examining divisions, opposition divisions, and boards of appeal, any differences or all alike? Is it required that doubt is substantiated -rather than just asserted- as to its existence before it has to be proven? The Case Law Book (8th edition, July 2016) provides in section I.C.2.8.5 "Proof of common general knowledge": "Where an assertion that something is common general knowledge is challenged, the person making the assertion must provide proof that the subject-matter in question is in fact common general knowledge (T 438/97, T 329/04, T 941/04, T 690/06). In the case of any dispute as to the extent of the relevant common general knowledge this, like any other fact in contention, has to be proved, for instance by documentary or oral evidence (T 939/92, OJ 1996, 309, see also T 766/91, T 1242/04, OJ 2007, 421; T 537/90, T 329/04 and T 811/06). The proof is regularly supplied in citing literature (T 475/88). According to T 766/91 and T 919/97, evidence of general technical knowledge need be submitted only if the latter’s existence is disputed.". In the current case, the board however seems to indicate that the situation is different if the board itself uses common general knowledge to invalidate a claim.

T 1553/06 - Admissability of Test Cases


Annotation for Technical Board of Appeal of the EPO, T 1553/06 (Public availability of documents on the World Wide Web/PHILIPS) of 12.3.2012

Last March the Board of appeal decided in a rather unusual opposition procedure (T 1553/06).  It appears that the opposition was a test case in which the proprietor and opponent cooperated to create a specific set of facts to allow a board of appeal to rule when Internet publications are publicly available.  This annotation will only discuss the admissibility of the opposition.

Cooperation between opponent and proprietor is the only subject on which the Enlarged Board of Appeal ever reversed itself. Whereas G 1/84 allowed a patent proprietor to oppose his own patent, but G 9/93 explicitly reversed this.  Later the enlarged board further sharpened this rule, in G 3/97, by forbidding anyone from opposing a patent if that opponent is acting on behalf of the patent proprietor.

So when the board of appeal suspected that the opponent had worked together with the proprietor to create a rather specific set of circumstances, they naturally were on their guard.  There were plenty of indications in the file which could give the board of appeal such a suspicion. For example, the opponent could make use of four documents (I1 to I4) which contain nearly the identical wording of original claims 1, 2, 3 and 4 of the application as filed. It appeared that the applicant had access to information about I3 and I4, before the application was filed. Conveniently, the retrieval from the Internet of documents I1 and I2 was recorded by a notary public, shortly before the filing date of the application.  One of the recorded documents even stated that ‘This page will be used for a test case relating to Internet publications.’

In the summons to oral proceedings the Board noted that if the proprietor and the opponent had indeed worked together to create a test case then the proceedings may not be contentious. A non-contentious opposition would be inadmissible.  Apart from the G decisions cited above, which hold that opposing on behalf of the patent proprietor is an abuse of process, the summons also cited G 9/91 and G 10/91 which state that opposition proceedings are in principle to be considered as contentious, wherein the parties normally represent opposing interests.

Given the suspicions of the board and its interpretation of the case law, one would fear that this test case would be short lived. However, the parties succeed in convincing the Board that these proceedings were contentious and thus admissible. Two arguments seem to have swayed the board (section 1.3 of the decision): The parties agreed that the opponent was not bound by any instructions from the patentee and the parties defended mainly opposing positions. (See also the headnote)

The Enlarged Board (G 3/97, 5.1.1) did not consider it a problem that employment of a straw man would normally not be detected by the EPO. The rule against self-opposition through a straw man would still force the parties to conduct the proceedings on an inter partes basis, since “[o]therwise, they must accept the possibility that the straw man's involvement may come to light.”  A relevant indication that the opponent is a straw man acting for the patent proprietor can emerge, in particular, from the relationship between the two. The question arises if such a relationship is present in the present case. The parties admitted that there was a substantial level of co-operation between them and other professional representatives in order to create a test case. (Section 6.2) Although the opponent may not have been explicitly bound by the proprietor's instructions at least they were bound to keep the fiction of the test case alive.

Strangely, even the Board itself seems to keep this fiction alive.  In section 5.2, the Board notes that the nature of a test case may impact the standard of proof. In section 6.3.2, considering that I1 and I2 must have existed on the Internet given that this is a test case and the existence of I1 and I2 is a precondition for enabling the board to deal with the gist of the test case.  In section 6.4, from the test nature of the present case it must be concluded that the notary was under a duty to keep the content divulged to it confidential, since “Otherwise the test case would be largely moot.”

They say that bad cases make bad law. If so, one could hope that specially constructed cases make good law. But one may wonder if it has worked out that way. The present decision has introduced a general test to decide when Internet disclosures are public. That general test which is now to be applied in all cases is based on a very specific and artificial set of circumstances which are very unlikely to occur in real life. Every time an Internet disclosure is discussed one of the parties will doubtless raise that the disclosure was not publicly available based on the new test.

For example, the new test raises the question if access to a document stored on the World Wide Web is not merely theoretical. One indication for non-theoretical access is that the document could be found with the help of a public web search engine by using one or more keywords all related to the essence of the content of that document. In truly adversarial proceedings this would normally not be a point; the very fact that the opponent found the document is a strong indication that the document could be found without the help of the proprietor.   

It seems that the Board could have gone in another direction with this case. From the admission that the parties prepared evidence together, one could conclude that there is a relationship between the parties in the sense of G 3/97. From that relationship the Board could have concluded that these are not contentious proceedings as required. Even if one were to conclude from the opposing positions defended by the parties that these proceedings are contentious then in application of the principle of free evaluation of evidence the jointly prepared evidence should be given no weight.  The outcome of this case would be that either the opposition is inadmissible or that the patent would be maintained as granted for lack of evidence.

As for Internet disclosures, we would be left with the old, admittedly somewhat vague, rule that access to an Internet document must have been ‘direct and unambiguous’ for the document to be publicly available (G 1/92). Real world cases would no doubt have given further meaning to these terms in due time.

The ‘Background of the invention’ in novelty and inventive step assessment


A patent application typically starts with a section called ‘background of the invention’. According to European patent law the application should indicate the background art which, as far as is known to the applicant, can be regarded as useful to understand the invention (Rule 42 EPC). The rule helpfully adds that, preferably, the documents reflecting such art should be cited.

A good background sets the context and makes it easy to understand the invention. For applicants that is generally a good thing. An Examiner who is convinced that you have an invention may be more sympathetic to your struggle to get the claims to accurately represent that invention. The background helps to ‘sell’ the invention.

On the other hand, ‘anything you say can and will be used against you’. If the background section is to represent state of the art, then your claims should be inventive when compared to it. If your claims are only a non-inventive variation of the prior art in your background, your invention is not looking good. After all, if even the applicant, who it may be assumed has the best interests of the invention in mind, states that something is known, then the public should be able to rely on that.

So can an Examiner cite your background section against you, or not? Reasoning from the EPC, one would think that he cannot. Art. 54(2) EPC defines the state of the art as everything made available to the public (...) before the date of filing of the European patent application. The patent application, of which the background is part, is not available until 18 months after the filing date, not before it.
This question recently played a role before the Court of appeal in The Hague, in a case between Sanofi and Ratiopharm. (Thanks to IEPT for the text of the decision). In section 11.3 the court considers this question as follows (my translation from Dutch):
In so far that the first-instance court must be considered to have only used the background section of the patent to draw conclusions about the teachings of the state of the art, that is not correct, because the background as such is not part of the prior art. In her statement of appeal, in section 5.20, Sanofi correctly points to case law of the EPO, which considers that using the background section in such as manner is deemed unacceptable. The case-law of the EPO acknowledges that the picture that the background section of a patent draws of the prior art may be based on personal prejudices or views of the inventor / patent attorney and so should be used reluctantly.
At least the Dutch court of appeal is of the opinion that your background section cannot be cited against you as part of the prior art. Unfortunately, the decision does not say which EPO case-law swayed the court.

One decision which, to some extent, supports the court’s point of view is T 654/92. A document was acknowledged in the patent. In the course of the oral proceedings it became clear though that it did not form part of the state of the art, but represented internal knowledge of the applicant's company. Any such art was to be ignored in an assessment of inventive step.

However, there is case law which has a stricter point of view. For example, in T 1073/02, the application contained a drawing "Fig. 6" with the title "background art", together with an explanation of the drawing. According to the applicant that figure did not relate to known prior art. However no explanation could be given why the figure was titled so. The board wanted to consider it as part of the prior art, and even as the closest prior art. The board required “sound evidence in support of the contention submitted by the appellants that said "background art" is not contained in the prior art”. The board then observes that no such evidence has yet been provided. After the case is remitted, the applicant succeeds in explaining the origin of the background art to the Examining division and obtains a grant after all.

Although the standard of proof appears to differ in these decisions, both of them seem to assume that an admission made in the background art is part of the state of the art until reasons are given why the admission was made erroneously.

For these reasons I would not agree to a blanket statement saying that before the EPO ‘background as such is not part of the prior art’. Likely the discussion before the court was more nuanced than can be gleaned from the decision alone. One should prudently assume that admissions made in the background may be cited against you. Good advice is given by Rule 42 itself: if you are going to describe prior art, then preferably, cite a document reflecting such art. It will stop you from disclosing anything that is not public.