1645822

Information

• Patent Grant
• 1645822

• References
• Source

• Patent Number

  1,645,822

• Date Filed

  Not available

• Date Issued

  Tuesday, October 18, 1927
  97 years ago

• CPC

  • G10K1/347 - for an oscillating bell which is driven twice per cycle

• US Classifications

  • 116 - Signals and indicators