Read the full judgment text of on BabelCite. was delivered on 18 December 1991.
1. The plaintiffs brought an action in the High Court claiming, inter alia, an injunction and damages, or at their option an account of profits, for the infringement of their patent. The defendants raised the issue of the validity of the patent by way of counterclaim. On 4th September 1989, the hearing of the action began before Mayo, J. On 2nd October he gave judgment, and his judgment is now reported at [1990] 1 HKLR 330. He found the patent to be valid, but that it had not been infringed by t