Mouse-patents-englebart-rid

Krótki link:

https://www.plwiki.pl/b/35255

źródło:

Wikimedia Commons

Wymiary:

882 x 276 Pixel (41005 Bytes)

Opis:

Early mouse patents. (left to right) Opposing track wheels by Englebart, 11/70, 3541541. Ball and wheel by Rider, 9/74, 3835464. Ball and two rollers with spring by Opocentsky, 10/76, 3987685.

Licencja:

Public domain