@patent{holube1997b,
 author = {Holube, I. and Sigwanz, U. and Martin, R. and Zoel, F.},
 title = {Programmierbares Hörgerät / Programmable hearing aid / Programmable hearing aid operable in a mode for tinnitus therapy},
 tags = {H+A, Hörgeräte},
 year = {1997},
 number = {DE59607724, EP 0820211, US 6047074},
}