"(3) There be an enquiry as to damages suffered by the Plaintiffs by reason of the acts of infringement of the Patent and of the rights conferred by publication of the application for the Patent by the Defendant and each of them or at the Plaintiffs’ option an account of profits made by the Defendants by reason of such acts. The costs of the enquiry or account are reserved. (4) The Defendants pay to the Plaintiffs all sums found to be due to the Plaintiffs on the said account/or enquiry together with interest thereon pursuant tosection 35A of the Supreme Court Act 1981 and/or pursuant to the Court’s equitable jurisdiction". 2. "
"3.1.(1) The list of powers in this rule is in addition to any powers given to the court by any other rule or practice direction or by any other enactment or any powers it may otherwise have. (2) Except where these Rules provide otherwise, the court may – … (f) stay the whole or part of any proceedings either generally or until a specified date or event."
"The Plaintiff in an action for infringement of a Patent succeeded at the trial, and an injunction was granted, and an inquiry ordered what damage had been sustained by the Plaintiff by reason of the infringement by the Defendant of the Patent. Subsequently to this judgment, the Defendant obtained evidence of prior user of the invention, and presented a Petition for revocation of the Patent, and at the hearing of the Petition the Patent was revoked, and this decision was affirmed on appeal. On the inquiry in the action the Master found and certified that, by reason of the revocation of the Patent, the Plaintiff had not sustained any damage; but if it should be held that, notwithstanding the revocation of the Patent, the Plaintiff was entitled to damages, he found that they amounted to£110 "
"Therefore the real question turns upon this, was there any estoppel operating to prevent the Defendants on that inquiry as to damages setting up the fact of the revocation as conclusive on the question of damage or no damage, or were they bound to allow matters to proceed without setting up the Order for revocation, so that, first the Master, and then the Court, should give a sum by way of damages on that state of affairs, assuming the validity of the Patent which did not exist. It is really a pure matter of estoppel. I think that on principle it is absolutely clear that a judgment for an injunction and an inquiry as to damages in an action for infringement does estop a defendant from setting up upon the enquiry the invalidity of the Patent. So far as he is concerned he is estopped from denying the validity of the Patent at the date of the trial, which is the date with reference to which the inquiry for damages is directed, and, of course, estopped from denying its validity at the date of the infringement in respect of which the inquiry as to damages is directed."
"The question, therefore, for me to decide is whether or not I can apply that principle of an estoppel upon an estoppel in the present circumstances, so as to avoid having to give the Plaintiff in the action a sum by way of damages when as a matter of fact, the Patent having been ab initio void, he suffered no damage at all? Having regard to the practice that has been laid down in the Court of Appeal, and having regard to the fact that I am of opinion that a decree for revocation of a Patent is a judgment in rem, I think I am not justified in deciding that I ought to apply a principle for which I can find no authority, and, therefore, in my opinion, I am forced to the decision that the original estoppel is a good estoppel and that the Certificate must be varied by stating the finding as to the£110 damages."
"In my opinion this judgment of Mr Justice Parker is perfectly right. The Plaintiff obtained judgment in an action for the infringement of a Patent, and consequently upon that judgment there was an inquiry ordered as to the amount of damages sustained. The judgment so obtained by the Plaintiff is a judgment which made the matter of the infringement and the validity of the Patent res judicata as between these parties and created a perfect estoppel."
"I am not so clear upon this question, I confess, as my learned brothers are, but I can see a reason for answering the question in the same direction, and my reasons for concurring in the judgment are these. The judgment in the infringement action was of course a complete judgment inter partes. It contained a certain subsidiary Order, - an Order for inquiry as to damages. That Order was a complete judgment inter partes, and it was an Order made upon a certain basis – namely, upon the basis as established at that date, that the Patent was valid. You may express it thus, that there was a complete judgment inter partes to ascertain what damage the Plaintiff had sustained upon the footing that his Patent was valid. That being inter partes, res judicata cannot be affected by the fact that subsequently, upon a Petition for revocation, the Patent was held to be invalid. That is to say, in the proceeding directed for ascertaining damages upon a particular footing the Patentee is not estopped by the Order from saying that that is the relevant footing for ascertaining those damages; and on those grounds I concur in thinking that the appeal should be dismissed."
"I think it is obvious on the face of it, that a judgment for the revocation of the Patent would in effect put an end to the injunction, because the question whether a Patent has been infringed or not is a question to be tried at the date of the alleged infringement, and, if there is no Patent at that date because it was revoked, that would not be an infringement; so that in effect an Order for revocation of a Patent would in every case put an end to the injunction."
"An order for the revocation of a patent is conclusive in rem, as it extinguishes the patent, but it does not avoid prior estoppels from a prior decision in personam that the patent was valid and infringed."
"It is appropriate to commence by noticing the distinction between cause of action estoppel and issue estoppel. Cause of action estoppel arises where the cause of action in the later proceedings is identical to that in the earlier proceedings, the latter having been between the same parties of their privies and having involved the same subject matter. In such a case the bar is absolute in relation to all points decided unless fraud or collusion is alleged, such as to justify setting aside the earlier judgment. The discovery of new factual matter which could not have been found out by reasonable diligence for use in the earlier proceedings does not, according to the law of England, permit the latter to be re-opened."
"In trying this question, I believe I state the rule of the court correctly, when I say, that where a given matter becomes the subject of litigation in, and of adjudication by, a court of competent jurisdiction, the court requires the parties to that litigation to bring forward their whole case, and will not (except under special circumstances) permit the same parties to open the same subject in contest, but which was not brought forward only because they have, from negligence, inadvertence, or even accident, omitted part of their case. The plea of res judicata applies, except in special cases, not only to points upon which the court was actually required by the parties to form an opinion and pronounce a judgment, but to every point which properly belonged to the subject of litigation, and which the parties, exercising reasonable diligence, might have brought forward at the time."
"But Henderson v Henderson abuse of process, as now understood, although separate and distinct from cause of action estoppel and issue estoppel, has much in common with them. The underlying public interest is the same: that there should be finality in litigation and that a party should not be twice vexed in the same matter. This public interest is reinforced by the current emphasis on efficiency and economy in the conduct of litigation, in the interests of the parties and the public as a whole." 28. "
"Patent infringement suits were brought against two corporations, one of which later became subsidiary of the other. Judgment in favor of patentee respecting validity issues was affirmed on interlocutory appeal, 887 F.2d 1094, in suit against the parent. Following judgment of invalidity in a separate suit against third party, 5 F.3d 1557, while parent’s case was still pending for determination of damages and other issues, parent moved to vacate liability judgment on ground of collateral estoppel."
"In Blonder-Tongue, supra, the Supreme Court ruled that once the claims of a patent are held invalid in a suit involving one alleged infringer, an unrelated party who is sued for infringement of those claims may reap the benefit of the invalidity decision under principles of collateral estoppel. Mutuality of estoppel is no longer required. Thus, the benefits of collateral estoppel (now generally termed issue preclusion) arising from a final judgment of patent invalidity were extended to an alleged infringer other than the defendant who earlier successfully litigated the matter and those in privity therewith."
"Mendenhall asserts, in essence, that these cases are far too long along for appellants to invoke collateral estoppel. Except for timeliness and variations of that argument, Mendenhall suggests no grounds for averting the application of collateral estoppel to its claims against these appellants. For reasons that follow, we reject Mendenhall’s arguments on timeliness and collateral issues and hold that collateral estoppel applies. It would be contrary to the policies expressed in Blonder-Tongue were this court now to enter the judgments Mendenhall seeks in these appeals. For this court to affirm the findings of infringement and the willfulness of conduct against one appellant, increase damages against the other, and uphold injunctions against both, appears anomalous in the extreme in connection with patents this court has just held invalid."
"Thus, the policy behind the law of the case that a court will not "revisit" a decided issue is not present here."
"Further, when the rest of the industry is not impeded by the patents, it seems manifestly unjust to rely merely on ‘judicial economy’ as justification for holding appellants liable and impairing their ability to compete."
"An Act to establish a new law of patents applicable to future patents and applications for patents; to amend the law of patents applicable to existing patents and applications for patents; to give effect to certain international conventions on patents; and for connected purposes."
"Whereas by a resolution made, on the signature of the Community Patent Convention the governments of the member states of the European Economic Community resolved to adjust their laws relating to patents so as (among other things) to bring those laws into conformity with the corresponding provisions of the European Patent Convention, the Community Patent Convention and the Patent Co-operation Treaty, it is hereby declared that the following provisions of this Act, that is to say, sections 1(1) to 4(2), 2 to 6, 14(3), (5) and (6), 37(5), 54, 60, 69, 72(1) and (2), 74(4), 82, 83, [88(6) and (7),] 100 and 125, are so framed as to have, as nearly as practicable, the same effects in the United Kingdom as the corresponding provisions of the European Patent Convention, the Community Patent Convention and the Patent Co-operation Treaty have in the territories to which those Conventions apply."