3136857

Information

• Patent Grant
• 3136857

• References
• Source

• Patent Number

  3,136,857

• Date Filed

  Not available

• Date Issued

  Tuesday, June 9, 1964
  59 years ago

• CPC

  • H04M15/38 - Charging, billing or metering by apparatus other than mechanical step-by-step counter type

• US Classifications

  • 379 - Telephonic communications