“When a plaintiff has a prima facie right to damages and an injunction restraining infringement, but the defendant has an outstanding application for registration which will give rise to a backdated defence if successful, what course should the court adopt? The authorities show that the court may adopt any of three alternatives: (1) the court may grant a stay of the proceedings for infringement pending the outcome of the application for registration (as in James & Sons v. Wafer Razor Co. Ltd.); (2) the court may allow the case to proceed to trial and after judgment consider the grant of a suspension of any order made pending the outcome of the application (as in the Electrolux case); or (3) grant full relief at the time, but add a proviso to any injunction to the effect that nothing therein shall prejudice the right of the applicant to proceed with his application for registration and (if successful) to exercise any rights conferred by such registration (as in Berlei (UK Ltd) v Bali Brasserie Co. Inc [1970 ]R.P.C. 469 (Megarry J.) and [1972] R.P.C. 568 (Pennycuick J.)).”
“In the balancing exercise required of the interests of the parties, in the ordinary case the grave injustice of depriving a defendant of the opportunity to secure and invoke an absolute defence by a successful application for registration will be decisive: see James v. Wafer Razor Co. Ltd. (1932) 49 R.P.C. 597. But this will not be so in all cases, e.g. where the applicant cannot show that prior to the application for the stay he has done everything reasonable to speed the application: see Berlei (UK Ltd) v Bali Brasserie Co. Inc [1970] R.P.C. 469. The court may take into account the availability of an interlocutory injunction to protect the plaintiff in the interim period.”