Legend has it that Douglas Engelbart invented the mouse in 1968.

But did you know that German television manufacturer Telefunken released a "rolling-ball" device just a few months earlier?

From a technical perspective it actually closely resembles the kind of mouse that we ended up using until the late 90s.

The German patent office declined a patent due to a "lack of inventive step".

en.wikipedia.org/wiki/Computer

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