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Guidelines for Examination


The application must contain "one or more claims".

These must:

"define the matter for which protection is sought"; 
"be clear and concise"; and 
"be supported by the description". 

Since the extent of the protection conferred by a European patent or application is determined by the claims (interpreted with the help of the description and the drawings), clarity of the claims is of the utmost importance (see also F-IV, 4).