3320369

Information

• Patent Grant
• 3320369

• References
• Source

• Patent Number

  3,320,369

• Date Filed

  Not available

• Date Issued

  Tuesday, May 16, 1967
  57 years ago

• CPC

  • H04M1/278 - using punched cards or tapes

• US Classifications

  • 379 - Telephonic communications