3689893

Information

• Patent Grant
• 3689893

• References
• Source

• Patent Number

  3,689,893

• Date Filed

  Not available

• Date Issued

  Tuesday, September 5, 1972
  52 years ago

• CPC

  • G06F15/02 - manually operated with input through keyboard and computation using a built-in programme
  • G06C29/00 - Combinations of computing machines with other machines
  • G06Q30/04 - Billing or invoicing

• US Classifications

  • 711 - Electrical computers and digital processing systems: memory
  • 235 - Registers