Working at the Telephonwerke Albisrieden he improved the transmission quality of speech, whereupon he was called to the central laboratories of the mother company Siemens & Halske in Berlin.
There he built the first remotely controlled ships and airplanes and investigated the physical properties of colour film.
[1] He developed and patented the Eidophor technique of displaying television pictures the size of cinema screens.
After years of development, Eidophor achieved commercial success[2] until Liquid Crystal Display LCD (another invention with important Swiss contributors[3]) and Digital Light Processing DLP video projectors became available.
Other early assistants at his Institute were Hugo Thiemann (founding member of the Club of Rome), Gustav Guanella, Werner Lindecker and Erna Hamburger, who became famous on their own.