Chapter X – Search report
4. Identification of the European patent application and the search report type
The European patent application concerned is identified on the main page and supplemental sheets by its application number.
The search report type is also specified.
Where the application and the search report are published together, the main page of the report is marked A1 (WIPO Standard ST.16). If the application is published before the search is carried out, the main page is marked A2 (WIPO Standard ST.16). The later search report is drawn up on a new main page marked A3 (WIPO Standard ST.16). If it is a supplementary European search report for an international application, the new main page is marked A4 (WIPO Standard ST.16).