European Patent Convention
Article 148
The European patent application as an object of property

(1)Article 74 shall apply unless the group of Contracting States has specified otherwise.

(2)The group of Contracting States may provide that a European patent application for which these Contracting States are designated may only be transferred, mortgaged or subjected to any legal means of execution in respect of all the Contracting States of the group and in accordance with the provisions of the special agreement.