If the European Patent Office is informed of the existence of a prior right under Article 139, paragraph 2, the European patent application or European patent may, for such State or States, contain claims and, where appropriate, a description and drawings which are different from those for the other designated States.
Date retrieved: 30 December 2018
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EPC Implementing Rules
EPO Guidelines - A Formalities Examination
EPO Guidelines - D Opposition and Limitation/Revocation Procedures
EPO Guidelines - G Patentability
EPO Guidelines - H Amendments and Corrections
XGL H III 4.5 Opposition proceedings where the claims as granted are different for different contracting states