Ajit Pai @AjitPai
OTD in 1970, @uspto granted @SRI_Intl's Douglas Engelbart a patent for an "X-Y position indicator control" through which "movement by the hand over any surface [would] move a cursor over the display on a cathode ray tube"—or what we know today as a mouse. https://t.co/FjSujQWnWu https://t.co/C69OwrBtsK — PolitiTweet.org