3205309

Information

• Patent Grant
• 3205309

• References
• Source

• Patent Number

  3,205,309

• Date Filed

  Not available

• Date Issued

  Tuesday, September 7, 1965
  59 years ago

• CPC

  • G06Q30/04 - Billing or invoicing
  • G06K1/125 - by magnetic means
  • H04M15/04 - Recording calls , or communications in printed, perforated or other permanent form
  • H04M15/38 - Charging, billing or metering by apparatus other than mechanical step-by-step counter type

• US Classifications

  • 379 - Telephonic communications