In 1970, this evolved into a device named "Touchinput-Einrichtung" ("touch input facility") for the SIG 50 terminal utilizing a conductively coated glass screen in front of the display. This was patented in 1971 and the patent was granted a couple of years later. The same team had already invented and marketed the Rollkugel mouse RKS 100-86 for the SIG 100-86 a couple of years earlier.

1968: ATC

The application of touch technology for air traffic control was described in an article published in

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