Article R623-58 of the French Intellectual Property Code
Any person who, on the occasion of any acts of transfer, concession or marketing of a variety benefiting from a plant variety certificate, wishes to make use of the option offered to him by Article L. 623-15 to attach a trademark or service mark to the variety denomination, whether this trademark is his own or has been granted to him, must take the necessary precautions, particularly in correspondence, advertising, in…