Pystynen, J. (Inventor), Haikala, H. (Inventor), P, K. (Inventor), Kaivola, J. (Inventor), Pollesello, P. (Inventor), Ulmanen, I. (Inventor), Tenhunen, J. (Inventor),
Tilgmann, C. (Inventor), Tiainen, E. (Inventor), K, L. (Inventor), P, N. (Inventor), S, P. (Inventor), A, K. (Inventor) & Levijoki, J. (Inventor),
2001 Jul 24, IPC No. 514-317, Patent No. US 6265421, Priority date
1997 Jun 25Research output: Patent