Ilpo, R. (Inventor), Hannu, N. (Inventor), Jyrki, K. (Inventor),
Kirsi, T. (Inventor), Mika, V. (Inventor) & Timo, K. (Inventor),
13 Nov 1998, IPC No. H04M 1/ 725 A N, Patent No. AU7046798, Priority date
22 Apr 1998, Priority No. WO1998FI00359
Research output: Patent › Research