German start-up in global demand with anti-virus escalators
Tanja Nickel and Katharina Obladen were still in high school when they patented an idea to disinfect escalator handrails using UV light.
Apr 26, 2020
Tanja Nickel and Katharina Obladen were still in high school when they patented an idea to disinfect escalator handrails using UV light.
Apr 26, 2020