306. The Convention.

Under the European Patent Convention1 a person seeking protection for an invention may file a single application for a patent at the European Patent Office2 specifying in which of the contracting states he desires to obtain protection3. After an examination for patentability4 by the European Patent Office, a European patent is granted. A European patent takes effect as a number of national patents operative in the states designated by the applicant5. A European patent may be opposed before the European Patent Office within the period of nine months after its grant6. If no opposition is entered or any such