Rault, J. B. (Inventor), Dehery, Y. F. (Inventor), Roudaut, J. Y. (Inventor), Bruekers, A. A. M. L. (Inventor) &
Veldhuis, R. N. J. (Inventor),
25 May 1993, IPC No. H04J 13/ 00 A I, Patent No. US5214678, Priority date
2 Jun 1989, Priority No. EP19890201408
Research output: Patent