Donut Robotics
https://www.forbes.com/sites/simonchandler/2020/06/26/coronavirus-japanese-firm-unveils-smart-face-mask-that-connects-to-phones/#8cef1d93f3a0
Japan
https://www.forbes.com/sites/simonchandler/2020/06/26/coronavirus-japanese-firm-unveils-smart-face-mask-that-connects-to-phones/#8cef1d93f3a0