Classifications

• • G—PHYSICS
  • G06—COMPUTING; CALCULATING OR COUNTING
  • 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
• • G—PHYSICS
  • G11—INFORMATION STORAGE
  • G11C—STATIC STORES
  • G11C13/00—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00
  • G11C13/04—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00 using optical elements ; using other beam accessed elements, e.g. electron or ion beam
• • H—ELECTRICITY
  • H03—ELECTRONIC CIRCUITRY
  • H03K—PULSE TECHNIQUE
  • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
  • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
  • H03K17/78—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled

Applications Claiming Priority (1)

Publications (1)

Family

ID=21884537

Family Applications (1)

Country Status (5)

Families Citing this family (1)

• 0
  • NL NL225599D patent/NL225599A/xx unknown
  • BE BE565559D patent/BE565559A/xx unknown
• 1958
  • 1958-03-07 FR FR1199594D patent/FR1199594A/en not_active Expired
  • 1958-03-10 CH CH357436D patent/CH357436A/en unknown
  • 1958-03-12 GB GB7937/58A patent/GB873140A/en not_active Expired

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