A European patent with unitary effect and a French patent application or a French patent with the same filing date or the same priority date, covering the same invention and belonging to the same inventor or his successor in title, may not, in respect of the common parts, be the subject independently of each other of a transfer, pledge, hypothecation or grant of exploitation rights, on pain of invalidity.
As an exception to Article L. 613-9, the transfer or amendment of the rights attached to the French patent application or to the French patent shall be enforceable against third parties by its entry in the national patent register only to the extent that the same transfer or amendment of the rights attached to the European patent with unitary effect has been entered in the register of the unitary protection conferred by a patent.