1649877

Information

• Patent Grant
• 1649877

• References
• Source

• Patent Number

  1,649,877

• Date Filed

  Not available

• Date Issued

  Tuesday, November 22, 1927
  97 years ago

• CPC

  • E01F9/529 - specially adapted for signaling by sound or vibrations
  • Y10S116/16 - Road structure

• US Classifications

  • 049 - Movable or removable closures
  • 014 - Bridges
  • 116 - Signals and indicators
  • 235 - Registers
  • 238 - Railways: surface track
  • 404 - Road structure, process, or apparatus