3727010

Information

• Patent Grant
• 3727010

• References
• Source

• Patent Number

  3,727,010

• Date Filed

  Not available

• Date Issued

  Tuesday, April 10, 1973
  51 years ago

• CPC

  • H04M1/278 - using punched cards or tapes

• US Classifications

  • 379 - Telephonic communications