1237818

Information

• Patent Grant
• 1237818

• References
• Source

• Patent Number

  1,237,818

• Date Filed

  Not available

• Date Issued

  Tuesday, August 21, 1917
  107 years ago

• CPC

  • G10K1/074 - with rotary clappers or shells

• US Classifications

  • 116 - Signals and indicators