2554404

Information

• Patent Grant
• 2554404

• References
• Source

• Patent Number

  2,554,404

• Date Filed

  Not available

• Date Issued

  Tuesday, May 22, 1951
  73 years ago

• CPC

  • G04C21/14 - Electro-acoustic time announcement

• US Classifications

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