Huetter Christian, R., Pongratz, H. & Bergmann, A., 22 Jul 2010, IPC No. G01M 15/ 10 A I, Patent No. US2010180666, Priority date 19 Jan 2009, Priority No. AT20090000025U
Knopf, F., Pongratz, H. & Bergmann, A., 15 Jul 2010, IPC No. G01N 1/ 22 A I, Patent No. US2010175459, Priority date 13 Jan 2009, Priority No. AT20090000014U