1246708

Information

• Patent Grant
• 1246708

• References
• Source

• Patent Number

  1,246,708

• Date Filed

  Not available

• Date Issued

  Tuesday, November 13, 1917
  107 years ago

• CPC

  • G09B19/0007 - Signalling

• US Classifications

  • 434 - Education and demonstration
  • 116 - Signals and indicators