Gratitude is expressed to Julie Callaert and Mariëtte Du Plessis from ECOOM,the center for research & development monitoring for their help in building the search key and performing the patent search in the PATSTAT database.Finally, the authors are also grateful for the support of Cameron Dierendonck in setting up the concept of this review paper and the support of Timon Vankeirsbilck for providing expert advice on patents.This work has received funding from the Flemish environment department, the Foundation for Food and Agricultural Research [EggTech-0000000028], and the Research Foundation - Flanders [SB project 1SC7219N and SB project 1S54823N]. （）