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21 nov 1946 anni - Trackball

Descrizione:

The trackball, a pointing device, was invented in 1946 and patented in 1947 by Ralph Benjamin as part of a radar plotting system

Aggiunto al nastro di tempo:

Computer mice

29 set 2017

0

0

636

Data:

21 nov 1946 anni

Adesso

~ 78 years ago

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