Also in 1968, Telefunken in Germany had their "rollkugel" mouse http://www.oldmouse.com/mouse/misc/telefunken.shtml http://www.oldmouse.com/mouse/misc/telefunke

Also in 1968, Telefunken in Germany had their "rollkugel" mouse http://www.oldmouse.com/mouse/misc/telefunken.shtml http://www.oldmouse.com/mouse/misc/telefunken.shtml I wonder if the German inventor(s) knew about Englebart's mouse idea (which had been around since 63) or if they came up with the idea independently?