1671303

Information

• Patent Grant
• 1671303

• References
• Source

• Patent Number

  1,671,303

• Date Filed

  Not available

• Date Issued

  Tuesday, May 29, 1928
  96 years ago

• CPC

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

• US Classifications

  • 238 - Railways: surface track
  • 116 - Signals and indicators