2488840

Information

• Patent Grant
• 2488840

• References
• Source

• Patent Number

  2,488,840

• Date Filed

  Not available

• Date Issued

  Tuesday, November 22, 1949
  75 years ago

• CPC

  • G04C21/14 - Electro-acoustic time announcement
  • H04M3/4876 - Time announcements

• US Classifications

  • 369 - Dynamic information storage or retrieval
  • 968 - Horology