They made one mouse, not the mouse. Telefunken Rollkugelsteuerung was a little bit earlier, as an optional accessory to one of their vector graphics terminals.

They made one mouse, not the mouse. Telefunken Rollkugelsteuerung was a little bit earlier, as an optional accessory to one of their vector graphics terminals. https://en.wikipedia.org/wiki/Computer_mouse https://en.wikipedia.org/wiki/Computer_mouse