I read somewhere about a similar tech a long long time ago. It must have been this one: https://www.researchgate.net/publication/224648269_Tongue_drive_A_tongu

I read somewhere about a similar tech a long long time ago. It must have been this one: https://www.researchgate.net/publication/224648269_Tongue_drive_A_tongue_operated_magnetic_sensor_based_wireless_assistive_technology_for_people_with_severe_disabilities https://www.researchgate.net/publication/224648269_Tongue_dr...