@patent{blau_implantable_2013,
 author = {Blau, M. and Bornitz, M. and Zahnert, T. and Hofmann, G. and Hüttenbrink, K. B.},
 title = {Implantable eletromechanical Transducer},
 year = {2013},
 number = {EP 1 439 737},
}