1457705

Information

• Patent Grant
• 1457705

• References
• Source

• Patent Number

  1,457,705

• Date Filed

  Not available

• Date Issued

  Tuesday, June 5, 1923
  101 years ago

• CPC

  • G10K1/074 - with rotary clappers or shells

• US Classifications

  • 116 - Signals and indicators