1492003

Information

• Patent Grant
• 1492003

• References
• Source

• Patent Number

  1,492,003

• Date Filed

  Not available

• Date Issued

  Tuesday, April 29, 1924
  100 years ago

• CPC

  • G10K1/074 - with rotary clappers or shells

• US Classifications

  • 116 - Signals and indicators