2161945

Information

• Patent Grant
• 2161945

• References
• Source

• Patent Number

  2,161,945

• Date Filed

  Not available

• Date Issued

  Tuesday, June 13, 1939
  85 years ago

• CPC

  • H04M3/4876 - Time announcements

• US Classifications

  • 379 - Telephonic communications
  • 369 - Dynamic information storage or retrieval