“The other piece of historical evidence relied on by the defendants consisted of the steps taken by Dr Hilton, the inventor, to reach the invention. Dr Hilton was called by the plaintiff and was cross-examined. From time to time the courts have said that the way in which the inventor reached his invention is immaterial. He may think that he has made a marvellous invention or he may have worked out his development by a process which, to him, was entirely logical. But to use what he did and thought he had achieved as evidence for or against obviousness is to put the cart before the horse. Once the court has decided whether the step was obvious it can then assess whether what the inventor did was what the notional man in the art would have done from the pleaded art or not. Evidence from the inventor that he took a long time to make the invention and thought he was very clever is no evidence that he was. Similarly, analysis after the event of the logical steps he took to arrive at the invention is no evidence that it is obvious. If he is an inventive man he will no doubt see things more clearly than his notional non-inventive colleague. It would be strange if the fact that the inventor got to the invention was used as evidence that others would also. These propositions seem to me to be supported by cases such as Re IG Farbenindustrie AG’s Patent,(1930) 47 RPC 289 and Allmanna Svenska Elektriska A/B v. The Burntisland Shipbuilding Co. Ltd,(1952) 69 RPC 63 . In addition to this, for the same reasons as are set out above, the evidence of what the inventor did or thought is even more irrelevant if he never had before him the prior art on which the defendant is relying. In this case, it is quite clear that Dr Hilton did not have the Hingorani document at the time he made his development. It appears that he did have the results of a literature search which included a number of documents, including the Hingorani abstract, none of which is relied on by the defendants for the purpose of their obviousness attack. In the light of these considerations, I have come to the conclusion that all the historical evidence of what individuals did or are thought to have done at or about the priority date is of no assistance in determining whether or not Dr Hilton’s development was obvious. Furthermore, although there was extensive discovery, including discovery of Dr Hilton’s research work, very little of it was referred to in court and even the small number of documents which were took the case no further. This is a great pity because it has meant that the parties have spent much more on this litigation than was necessary and the trial lasted longer than it ought. In saying this, I do not mean to direct any criticism at the lawyers involved. In the absence of clear guidance from the court as to what is or is not admissible or of probative value, the parties and their advisers cannot be blamed for covering all the possibilities. Furthermore, in view of what was said by the Court of Appeal in SKM, the fact that the plaintiff felt obliged to give discovery of its research and development leading to the making of the invention cannot be faulted. However, there is much pressure now to reduce the cost of litigation in general and patent litigation in particular. Parties and the court must be astute to prevent the expenditure of time, effort and money on the filing and challenging of unnecessary evidence and discovery. As the Vice Chancellor said in Mölnlycke, secondary evidence on the issue of obviousness must be kept firmly in its place. If the evidence is of no weight it should be excluded from the outset. Evidence that others in the art did or did not make essentially the same development at or before the priority date of the patent should not be given unless it can be shown that those others were starting from or had brought to their attention all or some of the prior art pleaded in the case or the evidence is in some other way really relevant to the issues in dispute.” 44. Following the Woolf reforms, and notwithstanding its changes, practitioners (and I think not just in patent actions) carried on much as they did before. The cost of patent and large commercial actions did not reduce: if anything it went up. This was despite two important changes: the very important introduction into our scheme of civil procedure of the notion of proportionality, and a change in the nature of what documents are to be disclosed on a normal order for disclosure (formerly called discovery). 45. I start with the latter – the introduction of “standard disclosure”
“We desire to make the rule as large as we can with due regard to propriety; and therefore I desire to give as large an interpretation as I can to the words of the rule, “a document relating to any matter in question in the action.”