3769870

Information

• Patent Grant
• 3769870

• References
• Source

• Patent Number

  3,769,870

• Date Filed

  Not available

• Date Issued

  Tuesday, November 6, 1973
  51 years ago

• CPC

  • G10K1/341 - for a still-standing bell

• US Classifications

  • 084 - Music
  • 116 - Signals and indicators
  • 340 - Communications: electrical