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Publication of BE692392ApublicationCriticalpatent/BE692392A/xx
G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
G06K21/00—Information retrieval from punched cards designed for manual use or handling by machine; Apparatus for handling such cards, e.g. marking or correcting
G06K21/04—Information retrieval from punched cards designed for manual use or handling by machine; Apparatus for handling such cards, e.g. marking or correcting in which coincidence of markings is sensed optically, e.g. peek-a-boo system
Landscapes
Physics & Mathematics
(AREA)
General Physics & Mathematics
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Engineering & Computer Science
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Theoretical Computer Science
(AREA)
Perforating, Stamping-Out Or Severing By Means Other Than Cutting
(AREA)