3751638

Information

• Patent Grant
• 3751638

• References
• Source

• Patent Number

  3,751,638

• Date Filed

  Not available

• Date Issued

  Tuesday, August 7, 1973
  51 years ago

• CPC

  • G11C15/00 - Digital stores in which information comprising one or more characteristic parts is written into the store and in which information is read-out by searching for one or more of these characteristic parts
  • G06F3/16 - Sound input Sound output
  • G06K7/10 - by electromagnetic radiation
  • G06K17/00 - Methods or arrangements for effecting co-operative working between equipments covered by two or more of the preceding main groups
  • G06K21/02 - in which coincidence of markings is sensed mechanically

• US Classifications

  • 370 - Multiplex communications