1 J. Ogaw, "White cane for visually handicapped people. Japan Patent, 2003-265559"
2 "WHO"
3 "Miya, Support system for visually handicapped people. Japan Patent, 2001-319289"
4 G. Wei, "Investigation on full distribution CNC system based on SERCOS bus" 19 (19): 52-57, 2008
1 J. Ogaw, "White cane for visually handicapped people. Japan Patent, 2003-265559"
2 "WHO"
3 "Miya, Support system for visually handicapped people. Japan Patent, 2001-319289"
4 G. Wei, "Investigation on full distribution CNC system based on SERCOS bus" 19 (19): 52-57, 2008