3377429

Information

• Patent Grant
• 3377429

• References
• Source

• Patent Number

  3,377,429

• Date Filed

  Not available

• Date Issued

  Tuesday, April 9, 1968
  56 years ago

• CPC

  • H04M11/005 - using recorded signals

• US Classifications

  • 340 - Communications: electrical
  • 360 - Dynamic magnetic information storage or retrieval
  • 379 - Telephonic communications