2078312

Information

• Patent Grant
• 2078312

• References
• Source

• Patent Number

  2,078,312

• Date Filed

  Not available

• Date Issued

  Tuesday, April 27, 1937
  87 years ago

• CPC

  • H04M3/4876 - Time announcements

• US Classifications

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