In a case concerning two divisional patents derived from the same parent application, relating to ‘transcatheter heart valves’ or THVs, the Court of Appeal upheld the High Court’s decision that one patent was invalid for lack of inventive step and the second patent was valid.  The Court of Appeal also provided guidance on cross-examination of expert witnesses, in particular best practice in the situation where a party chooses not to cross-examine a witness.

A full summary of this case has been published on Kluwer IP Law.



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