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EPO: Inventive step the most effective patent killer


EPO oppositions are well established, meaning there are many lessons for patent owners and challengers, as Arnie Clarke and Jack Shepherd explain

On what grounds can a patent be opposed, and what is the relative effectiveness of these grounds? The grounds of opposition are set out in Article 100 EPC. To paraphrase, these include that the subject-matter of the European patent is not...


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