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People who use Guger Technologies' Intendix wave speller will need oceans of patience if a CeBIT demo is any indication.
Austria's Guger Technologies is billing the device as the world's first commercial personal brain-machine speller.
TechFirm's free iPad app enables people who can't use their fingers to tweet by selecting letters with breath power.
Scientists are working on a biomimetic chip called ReNaChip that could advance current treatments by making deep brain stimulation more precise.