3707715 is referenced by 13 patents and cites 4 patents.

A data input device comprises a single cathode ray tube whose screen is divided into a plurality of zones. Each zone is scanned with a pattern characteristic of a corresponding code by means of a code matrix. Each pattern excites a zone of the screen to display a corresponding alphanumeric or other symbol with an intensity sufficient to excite a photodetector, which provides an output signal indicative of the code corresponding to a zone when this zone is at least partially obscurated, for increasing the luminous intensity of the character on the screen.

Data input device
Application Number
Publication Number
Application Date
January 19, 1971
Publication Date
December 26, 1972
Perotto Pier Giorgio
Ing C Olivetti & C
G08b 05/36
H03K 17/969
H03K 17/94
G06F 03/23
G06F 03/33
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